The Euclidean Mission of the European Space Agency (ESA) has just released its first significant batch of research data, offering a fascinating glimpse into the vast cosmos.
This newly revealed image, covering a 63-square patch of the sky (over 300 times the size of a full moon), showcases millions of galaxies in intricate detail.
But this is just the beginning. The Euclidean mission, aimed at mapping the universe and unraveling the mysteries of dark matter and dark energy, which constitute 95% of the universe, has only just begun.
Launched in February 2024 and released in July 2023, Euclid is designed to survey a third of the sky, eventually capturing images of 1.5 billion galaxies. In just a week of observations, the mission has already spotted 26 million galaxies, some located an astounding 10.5 billion light years away.
Professor Carole Mandel, ESA’s director of science, described the release as “a treasure trove of information for scientists to delve into.” In an official statement, she highlighted Euclid’s role as the “ultimate discovery machine,” enabling astronomers to explore the grand structure of the universe with unparalleled precision.
The initial observations of the mission showcase Euclid’s capability to map the large-scale structures of the universe using high-resolution visible instruments (VIS) and near-infrared spectrometers (NISPs), capturing galaxies across vast distances and helping scientists track the intricate web-like structure of space.
This image shows not only light, gravity lenses within the cluster, but also a variety of huge galaxy clusters. The cluster near the center is called J041110.98-481939.3 and is almost 6 billion light years away. -ESA/EUCLID/EUCLID Image processing by CONSORTIUM/NASA, J.-C, Cuillandre, E. Bertin, G. Anselmi
“Euclid’s potential to unveil more about dark matter and dark energy from the massive structure of the Cosmic Web can only be realized once the entire survey is completed,” stated Dr. Clotilde Laigle, a scientist from the Euclidean Consortium.
“Nevertheless, this first data release offers a unique view into the vast organization of galaxies, providing insights into the formation of galaxies over time.”
With an immense data stream – sending back 100 GB of data to Earth per day – scientists are challenged with cataloging and analyzing an unprecedented number of galaxies. To tackle this, AI algorithms, in collaboration with thousands of citizen scientists, have categorized over 380,000 galaxies in their initial dataset.
The AI model known as “Zoobot” was trained over a month on the Galaxy Zoo platform with the help of nearly 10,000 volunteers to enhance their galaxy classification skills.
Dr. Mike Walmsley, an expert in astronomical deep learning at the University of Toronto, highlighted the significance of AI in processing Euclid’s vast datasets.
While scientists are still grappling with this first data release, many are already envisioning the future.
“Euclid will truly revolutionize our understanding of the universe,” stated Professor Christopher Conselice from the University of Manchester. He depicted the results as just “the tip of the iceberg,” foreseeing Euclid’s revelations about dark energy and a complete picture of galactic evolution throughout the ages.
The mission is still in its nascent stages, with the released data accounting for only 0.4% of Euclid’s final investigation scope. Setting the stage for even more profound discoveries, the initial data release indicates that Euclid is poised to offer a remarkable new perspective on the universe. In October 2026, ESA is expected to release Euclid’s first major cosmological dataset, covering larger research areas and multiple deep field paths.
If this initial glimpse is any indication, the coming years promise a deluge of data and discoveries that could redefine our understanding of the universe.
String theory is the best candidate we have for all theories. Bends to that rule, various entangled theories of traditional physics emerge as part of a sublime, higher-dimensional tapestry. It can unify all four of nature, including the most troublesome gravity of all. If you're lucky, you might even tame big bangs and black holes without losing threads.
There's only one catch. String theory cannot explain the universe like ours. That mathematics can explain billions of different possible universes, but not expanding at speeds of acceleration, it's exactly what we see. Certainly, no one knows that this acceleration is driving. Mystical “dark energy” is the usual placeholder. According to theory, it probably shouldn't happen at all.
For 25 years, this was a big problem, but now I may have found a way past it. On the surface, the answer does not shock anyone who is used to the luxury of modern physics. We need to rethink the universe as part of a much larger company. Doing this can bloat into the content of your mind. In fact, the acceleration of expansion seems to come naturally. However, this new scheme could be the wildest scheme ever. Our familiar spaces are delicately settled between high-dimensional hyperspace and total meaninglessness. “Our proposal says that our existence is like a shadow: a projection onto a wall at the end of the world.” Antonio Padillaa physicist at the University of Nottingham in the UK.
New image of cosmic microwave background radiation in part of the sky – the zoomed area is about 20 times the width of the moon seen from Earth
ACT collaboration. ESA/Planck Collaboration
The latest and greatest maps of the early universe, five times more detailed than anything before, are accurately supported by the main models of the universe, but are also a double-edged sword, as new data does not provide clues to solve some of the greatest mysteries of cosmology.
The map shows the universe’s cosmic microwave background (CMB). This is a faint remaining radiation from the early stages of the universe. It began as the earliest light just 380,000 years after the Big Bang, but the expansion of the universe over billions of years has shifted frequency from the visible spectrum to microwaves.
Now, new data from Atacama Cosmology Telescope (ACT) gave us a clearer image of the CMB only from half of the sky that can be imaged from the Chilean observatory location.
Joe Dunkley At Princeton University, which worked on the project, the data says it has more vigorously and accurately reduced the composition of the universe, its size, age, and magnification rate. But the truly important discovery was that nothing contradicts the current major model of the universe. Lambda-CDM.
Previous data set the universe’s age at 13.8 billion years old, and the velocity at which it is expanding – known as the Hubble constant – is 67-68 km per 67-68 km per megapulsek distance from Earth. The ACT data essentially confirms this, but increases accuracy and confidence in those findings.
CMB is first mapped by NASA’s Space Background Explorer (COBE) in the 1980s and 90s, then by NASA’s Wilkinson Microwave Anisotropic Probe (WMAP) in the 2000s, and then from the European Space Agency’s Planck Spacecraft to provide early knowledge from 2009 to 2013. universe.
One of the restrictions on the act is that unlike these previous space-based missions, it is a ground-based telescope. Therefore, it is limited to half of the sky. Nevertheless, the action not only provides better resolution and sensitivity than these previous maps, but also measures the direction in which the polarization or light waves of CMB are oscillated, revealing some information about how CMB light evolved over time.
“With a closer look at the polarization of the CMB, we could have seen something different. We could have seen the destruction of standard space models,” says Dunkley. “Every time you look at the universe differently, you can’t be sure the original model is still working. You were ready to see something coming out of that model.
This may be a relief for anyone working on Lambda-CDM, but it was not welcome news for all scientists. Colinhill At Columbia University in New York, he says he wanted to see some evidence in data on a phenomenon that has not yet been recognized (probably a new type of energy or particle). This helps explain the so-called Hubble tension.
“We’ve all been blown away by how consistent we are. [the ACT data] It’s really on the standard model. We all produce models from different aspects, looking for places where they break and where nature can give us something to sink our teeth. And so far, nature hasn’t created that crack,” says Hill.
He says that the most viable theory for the contradiction of Hubble tension requires phenomena that simply do not appear in the ACT data we currently have. This brings the scientist back to seek another explanation. “The new measurements will make theorists, including me, even closer restraint jackets,” says Hill. “That deepens the mystery.”
ACT collected data that constituted this new map between 2017 and 2022, but is now shut down. Dunkley says that while a new Chilean telescope will start work later this year, we are unlikely to get a higher resolution map for a few years. As for the other half of the sky, only two locations on Earth could potentially host a new telescope with results: Greenland and Tibet. Dunkley says that unfortunately Greenland still doesn’t have the infrastructure needed for such a project, and Tibet is politically sensitive.
Jens Chluba At the University of Manchester in the UK, scientists on the project are already working with data, but say the open release of ACT maps will cause a surge in activity.
The Mystery of the Universe: Cheshire, England
Spend a weekend with some of the brightest minds of science. Explore the mysteries of the universe in an exciting program that includes an excursion to see the iconic Lovell telescope.
It is explained in the paper published today journal Natural Astronomy the discovery means that habitable deplanets may have begun to form much earlier, before they were formed billions of years ago.
This artist's impression shows the evolution of the universe, beginning with the Big Bang on the left. After that, you will see the microwave background of the universe. The formation of the first stars ends the dark ages of the universe, followed by the formation of galaxies. Image credit: M. Weiss/Harvard – Smithsonian Center for Astrophysics.
“We had no oxygen before the first star exploded, so there was no water in space,” said Daniel Warren, an astronomer at the University of Portsmouth.
“Only a very simple nucleus survived the Big Bang: hydrogen, helium, lithium, trace amounts of barium and boron.”
According to Dr. Whalen and his colleagues, water molecules began to form shortly after the first supernova explosion known as the Population III Supernova.
These cosmic events that occurred on first generation stars were essential to creating the heavy elements (such as oxygen) needed for water to exist.
“The oxygen forged in the hearts of these supernovas combines with hydrogen to form water, paving the way for the creation of the essential elements needed for life,” Dr. Whalen said.
In their study, researchers looked at two types of supernovae. This produces corecrolaps supernovae, which produces a modest amount of heavy elements, and more energetic POP III supernovae.
They discovered that both types of supernovae form dense masses of rich gas in water.
The overall amount of water produced by these early supernovae was modest, but was highly concentrated in a gas-dense area called the cloud core, which is thought to be the birthplace of stars and planets.
These early, water-rich regions may have sown planetary formations at the dawn of space long before the first galaxy took shape.
“A significant discovery is that the primitive supernova formed water in the universe ahead of the first galaxy,” Dr. Hualen said.
“So water was already an important component of the first galaxy.”
“This means that the conditions necessary for the formation of life were in place faster than we could have imagined, meaning it was an important step in our early understanding of the universe.”
“The total water mass was modest, but it was very concentrated on the only structures that could form stars and planets.”
“And that suggests that before the first galaxy, a water-rich planetary disc could form at the dawn of space.”
We've all seen it frequently in science fiction films, so the concept seems completely plausible. Characters enter commands, and spacecraft reverse speed, jump to hyperspace, and create wormholes through space and time.
Whatever the terminology, the outcome is always the same. They fly through fictional universes faster than the speed of light, so travel between star systems is not only possible, but practical.
But in the real universe we live in, a huge barrier appears to forbid this. According to Albert Einstein's special theory of relativity, it cannot travel faster than light.
The light travels at an incredible speed of approximately 3 x 108 meters per second. This means that when you look at the universe, you won't see the heavenly objects as they are currently appearing. You can see how light from them first emerged when they departed across the universe.
Within the solar system, these delays are relatively short. For example, it takes only one second of sunlight to bounce off the surface of the moon and reach the Earth, but it takes eight minutes to cover the distance between the sun and our world.
Due to the enormous distance from us, if the sun suddenly disappears, you won't notice until 8 minutes later – Photo Credit: Getty
The more visible the longer the delay, which gives rise to the light-year concept as a measure of distance. Our closest star, Proxima Centauri, is about 4.25 light years away. In other words, it takes 4.25 years to get there from there. Therefore, the stars are not as they are now, and look like 4.25 years ago.
Beyond the vast expanse of the universe, distance is ultimately measured in billions of light years. This is what makes cosmology possible. The more we see the universe, the older the objects we see, and we can diagrammaticize today's evolution into stars and galaxies.
But if you can travel there and see what those objects look like now, wouldn't that be great?
Having a warp drive may sound like it, but it has some pretty weird results. For one thing, it would ruin the notion of causality.
Causality is our common sense perception that precedes effectiveness. But if you saw a faster spaceship trip towards you, you will see the ship in two places at once. The light carrying information about the ship's departure would not have reached the eye before the ship could be seen along the way.
Worse, the mathematics of relativity shows that if the speed exceeds the speed of light, literally time travel is possible.
This creates a full-scale causal paradox such as the famous “grandfather's paradox.” And how does it work – will you just no longer exist?
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At first glance, Einstein's theory appears to protect us from such head-envelope challenges, as it appears to make it impossible to move faster than light. Masu.
According to the equation, the energy required to accelerate the ship to such a speed is infinite. However, researchers then began to look at mathematics in more detail.
A general theory of relativity – Einstein's extension of his special relativity – he proposes that the universe is made of adaptive fabrics called the space-time continuum, and he uses gravity to make this fabric I explained that it was distorted.
Who knows if tachyons exist, but if so, the theory suggests that it travels faster than light. – Image credits: Science Photography Library
1994, Physicist Dr. Miguel Alcubière At the University of Wales, and at Cardiff, we showed that solutions exist within the theory of general relativity that can be interpreted as warp drives. The problem was that it requires an exotic substance known as “negative energy” to make it work.
Astronomers have toyed using the concept of negative energy to explain why the universe appears to be accelerating, but with an understanding of physics, matter is comfortable to exist It cannot be done.
Then in May 2024, A group of researchers reexamined mathematics We will use only the types of particles and energy that make up the planet and people to see if the Alkbiere Warp phenomenon can be generated.
Their conclusion: Yes, they did. Dr. Jared Fuchs And colleagues at the University of Alabama in Huntsville, USA, discovered that they could arrange for normal material and energy to create warp phenomena and transport people through space. But there was a catch: they could only make it work at sub-light speed.
“It takes a lot of energy to make small changes to the space,” Fuchs says. To move the passenger seat, the size of a small room requires a small house-sized “warp bubble” for the size of a small room. And to make it, you need to narrow the mass of Jupiter several times. It becomes the volume that is the size of a small asteroid.
“now, [is that] Is it possible? perhaps. [Is it] Practical? I wouldn't say that,” says Fuchs. Even if it was possible to create such a device, the old boundaries still exist. To accelerate faster than the speed of light, you need an infinite amount of energy.
“We will not resolve the future of rapid transportation like Star Trek,” admits Fuchs.
Trouble with Tachon
Other researchers have conducted their own research into relativity. Professor Andrzej Dragan Collaborators at the University of Warsaw in Poland decided to consider possible solutions within the equation of particles that travel faster than light.
Physicists have previously messed with such concepts. They even called such virtual particles “tachyons,” but essentially considered them more than mathematical curiosity. However, Dragan and her colleagues found an equation explaining Tachyon's behavior.
“Mathematically, they make perfect sense,” says Dragan. In other words, our familiar world of secondary particle particles could coexist with the upper heart family of the second family, the tachyon.
Unfortunately, this does not mean that spacecraft can speed faster than light. To do that, Dragan explains that it requires the infinite energy that Einstein predicted, as well as the infinite energy to slow the Tachyon down to a sub-blue-minal speed.
“You can't exceed the speed of light in either direction,” says Dragan.
Nevertheless, the study We have proposed some fascinating results that may explain some of the most inexplicable observations physicists are working on.
When dealing with Tachon, Dragan and his colleagues encountered the causal issues they had been expecting. But the more I looked into these details, the more I realized that something surprising was happening. The strict lack of causes and effects was very similar to the behavior of normal, everyday subatomic particles.
The theory of relativity explains the behavior of the universe at its largest scale, while quantum theory describes the subatomic domain as a very different location.
Quantum theory introduces probability into particle interactions. For example, we know that an atom can absorb photons of light and at some stage it will re-emit that photon, but we cannot predict when or in which direction it will take.
In other words, the exact cause is hidden from us, and all we have left is an observable effect. Dragan suggests that when tachyon interacts with normal substances, the outcome of that interaction is unpredictable – like the emission of photons.
So, while these latest ideas do not seem to open a route to practical warp drives, they may only show a deeper look at the nature of the cosmos and the origins of quantum behavior.
About our experts
Dr. Jared Fuchs He is the CEO of Celedon Solutions Inc. and works in the Faculty of Physics at the University of Alabama in Huntsville, USA. His work has been published Classical and quantum gravity.
Professor Andrzej Dragan He is a filmmaker and professor of physics at the University of Warsaw in Poland, and a visiting professor at the National University of Singapore. His work has been published Physical review, Classic and Quatnam Gravity and New Journal of Physics.
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If you ask someone how the universe began, they will probably reply with these three familiar words: the Big Bang. But just like in the 1960s, cosmologists discussed the issue with heat. On the other side of the discussion on the Big Bang was the idea of an unchanging “stable state” universe, whose density was kept the same by continuously adding new problems when it expanded.
Ultimately, observation ruled out the idea of the universe in a stable state and solidified the place of Canon's Big Bang in Cosmology. Its primitive explosion has begun a process of continuous expansion, and cosmologists today see cosmologists as a place of constant flux.
But now, a bold group of cosmologists is questioning everything. To be clear, this is not a return to steady-state universe, but is completely interesting. Researchers suggest that universe history could have been interrupted by a spell of eerie stillness. These periods of stagnation in the universe can occur in such a way that it replaces the entire epoch of traditional universe history, or is spliced within that timeline.
Bold is certainly the term of this hypothesis. “This refers to a completely different family that could have never realised we could have happened before this.” Adrienne Erickcek He was not involved in the work at the University of North Carolina, Chapel Hill. However, when these static periods exist, all sorts of challenges can be solved, including those in which dark matter is being created. Even more exciting, these ideas may be testable soon. …
The newly discovered radio jet is associated with J1601+3102, a highly radioloud kusar that spans an astounding 215,000 light years and exists just 1.2 billion years after the Big Bang. This structure was observed on a low-frequency array (LOFAR), Gemini North Telescope from the Gemini Near-Frared Spectrograph (GNIRS), and the hobby Eberly telescope, and the largest radio jet discovered early in the history of the universe. That's it.
“We were looking for a quasar with a powerful radio jet in the early universe, which helped us understand how the first jets were formed and how they influenced the evolution of the galaxy. ”
“Determining the properties of a quasar, such as its mass and the speed at which it consumes the problem, is necessary to understand its formation history.”
To measure these parameters, astronomers looked for specific wavelengths emitted by quasars known as the MGII (magnesium) wide emission lines.
This signal is usually displayed in the UV wavelength range. However, due to the expansion of the universe, which causes the light emitted by the quasar to “stretch” to a longer wavelength, the magnesium signal arrives at Earth in the near-infrared wavelength range that can be detected by the Gneal.
J1601+3102 Quasar was formed when the universe was less than 1.2 billion years. It's only 9% of my current age.
Quasars can have billions of times more mass than our Sun, but this is on the small side and weighs 450 million times the mass of the Sun.
The double-sided jets are asymmetric in both brightness and distance extending from the quasar, indicating that extreme environments may be affecting them.
“Interestingly, the quasars that run this large radio jet don't have any extreme black holes mass compared to other quasars,” Dr. Gloudemans said.
“This appears to indicate that generating such a powerful jet in early universes does not necessarily require very large black holes or accretion rates.”
The previous shortage of large radio jets in early space is attributed to noise from the microwave background of the universe. This is a constant fog of microwave radiation remaining from the Big Bang.
This permanent background radiation usually reduces the radio light of such distant objects.
“Because this object is so extreme, it can actually be seen from the Earth, even if it's far away,” Dr. Gloudemans said.
“This object shows us what we can discover by combining the forces of multiple telescopes operating at different wavelengths.”
result It will be displayed in Astrophysics Journal Letter.
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Anniek J. Gloudemans et al. 2025. Monster radio jet (>66 kpc) observed in quasars from z~5. apjl 980, L8; doi: 10.3847/2041-8213/AD9609
This article is based on a press release provided by NSF's Noirlab.
The upcoming director of CERN stated that advanced artificial intelligence is revolutionizing basic physics and opening windows for the fate of the universe.
Professor Marktomson, a British physicist who will take on the leadership at CERN on January 1, 2026, envisions progress in particle physics comparable to the AI-driven prediction of protein structure that recently won Google Deepmind Scientists an award. Speculations suggest a potential Nobel Prize in October.
With the Large Hadron Collider (LHC) playing a key role, there is hope to unravel how particles obtained mass at the moment of the Big Bang and whether our universe is extraordinary. Professor Marktomson mentioned the adoption of a similar strategy to potentially avert a catastrophic collapse event.
Tomson emphasized, “These are not just incremental improvements, but rather significant strides achieved by embracing cutting-edge techniques.”
He also added, “The field will undergo a transformative change. Dealing with complex data like protein folding presents intricate challenges, and employing advanced AI technologies can lead to breakthroughs.”
CERN’s council anticipates a promising future with revolutionary advancements. Despite skepticism following the groundbreaking Higgs boson discovery in 2012, Professor Thomson believes that AI brings a fresh perspective to explore new frontiers in physics. The enhanced beam strength of LHC is expected to enable unprecedented observations of the Higgs boson, also known as the “God particle,” shedding light on other particles and the universe at large.
There is a particular focus on measuring the Higgs boson’s self-coupling, which plays a critical role in understanding how particles acquire mass and the evolution of the Higgs field post-Big Bang. Higgs’ self-coupling strength is crucial for determining the stability of the Higgs field and potential future transitions.
Dr. Matthew McCallow, a theoretical physicist at CERN, emphasized that the exploration of Higgs’ self-coupling is significant for advancing our understanding of the universe’s fundamental characteristics. Integrating AI into LHC operations has streamlined data collection and interpretation processes, enabling faster decision-making for experiments like the LHC ATLAS project.
Scientists have long sought to uncover dark matter using the LHC, considering it comprises a significant portion of the universe. With AI’s assistance, researchers hope to untangle this mystery. Thomson remarked, “AI allows us to pose more intricate and open-ended queries rather than merely searching for specific signals, hoping to uncover unexpected insights within the data.”
Effectively zero. It may be attacked by the satellite that you fall.
Although the number of satellites in the orbit has risen in exponential functions, modern satellites have the ability to control the re -entry trajectory, and they are built from low -density materials to burn out as they fall into the atmosphere.
However, fragments in the universe are still reaching the ground. We use the rocket stage from the long March rocket in China as a recent example.
One piece per day sounds like a lot, but at least three airplanes are dropped (mainly non -profit aircraft) in order to focus on it. 。
Being attacked by a piece of satellite is unlikely to be hit by a part of the crashed airplane -credit: Petrovich9
When the plane crashes, it usually remains in one piece until the moment of the impact, and is often full of fuel. As a result, the falling aircraft is much more fatal than a typical cosmic fragment. This may be part of a small titanium and carbon fiber panel.
There is no difference here for the extra altitude that the fragments of the universe have fallen. Falling from 300 km (about 186 miles) is the same as 10 km (6.2 miles) to reach the terminal speed long before hitting the ground.
Aircraft tend to fly near a dense population area, but spaceship is much more evenly distributed around the world. If everyone in the world goes out and spread, they cover only about 0.0002 % on the surface of the earth.
Therefore, even if the fragments of the fallen universe are fatal, they miss 99.9998 % and translate them into one death every 1 or 300 years.
This article is the answer to the question (asked by Charlie Bond by e -mail) “What is the possibility of a falling satellite?”
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The concept of “strength” in materials refers to their ability to withstand deformation caused by external forces.
Typically, the strongest materials are the densest ones because atoms in close proximity offer greater resistance to compression. However, factors like structural properties can also influence strength, leading to exceptions like graphene, which is the strongest natural material despite not being the densest like osmium.
Some high-density states of matter, formed when massive stars collapse, are incredibly strong compared to ordinary matter. For instance, white dwarf stars have a structure composed of carbon and oxygen nuclei surrounded by electrons experiencing degeneracy pressure, preventing further compression.
However, in cases of extreme density like neutron stars, the degeneracy pressure of densely packed nuclei and free protons and neutrons overcomes electron degeneracy pressure, halting further collapse.
Nuclear pasta is created by the conflicting forces of protons and neutrons, resulting in various shapes. This tightly bound and incredibly strong material is believed to be the most robust substance in the universe. – Credit: Mark Garlick
The material within neutron stars is about 100 trillion times denser than anything found on Earth. While the exact structure is complex and uncertain, a theorized thin layer within the star undergoes a transition from normal to ultra-dense matter, forming different shapes known as nuclear pasta.
Scientists consider this ultra-dense material to be the strongest substance in the universe, estimated to be at least 10 billion times stronger than steel.
This article addresses the question (from Colin Davids of Bridgewater): “What is the strongest material in the universe?”
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Dark energy, the unknown energy source accelerating the expansion of the universe, doesn't actually exist, according to a new study.
This artist's impression shows the evolution of the universe, starting with the Big Bang on the left and continuing with the emergence of the Cosmic Microwave Background. The formation of the first stars ends the Dark Ages of the universe, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.
Dark energy is generally thought to be a weak antigravity that acts independently of matter and accounts for about two-thirds of the mass-energy density of the universe.
The lambda cold dark matter (ΛCDM) model, which has served as the standard cosmological model for a quarter of a century, requires dark energy to explain the observed acceleration in the expansion rate of the universe.
Astrophysicists base this conclusion on measurements of distances to supernova explosions in distant galaxies, which appear to be farther away than they should be if the expansion of the universe is not accelerating.
However, the current expansion rate of the universe is increasingly being questioned by new observations.
First, evidence from the Big Bang's afterglow (cosmic microwave background radiation) shows that the expansion of the early Universe is inconsistent with the current expansion, an anomaly known as the Hubble tension.
Furthermore, in an analysis of new high-precision data from the Dark Energy Spectrometer (DESI), the scientists showed that the ΛCDM model does not fit a model in which dark energy does not remain constant but evolves over time. I discovered it.
Both the Hubble tension and the surprises revealed by DESI are difficult to resolve with models that use the simplistic expansion law of the universe from 100 years ago, or the Friedman equation.
This assumes that the universe expands uniformly on average. It's as if you could put all the cosmic structures in a blender and make a nondescript soup without complex structures.
But the current universe actually contains a complex cosmic web of galaxy clusters of sheets and filaments that surround and thread a vast void.
“Our findings show that dark energy is not needed to explain why the universe appears to be expanding at an accelerating rate,” said Professor David Wiltshire.
“Dark energy is a misidentification of fluctuations in the kinetic energy of expansion, which is not uniform in the blocky universe we actually live in.”
“This study provides compelling evidence that may answer some of the key questions about the quirks of our expanding universe.”
“With new data, the universe's greatest mysteries could be solved by the end of the decade.”
New evidence supports the timescape model of the expansion of the universe, which says dark energy is not needed because the difference in the stretch of light is not a result of the universe's acceleration, but of how it adjusts time and distance. .
An ideal clock in empty space would tick faster than in a galaxy, since gravity slows time down.
This model suggests that the Milky Way's clock is about 35% slower than the same clock at its average location in the large cosmic void. That means billions more years have passed in the void.
This allows for further expansion of the universe, and as such a vast void grows to dominate the universe, it appears to be expanding faster and faster.
“We now have so much data that only in the 21st century can we begin to answer the question of how and why a simple mean expansion law emerges from complexity. ” said Professor Wiltshire.
“A simple law of expansion consistent with Einstein's theory of general relativity does not need to obey Friedman's equation.”
“ESA's Euclid satellite, launched in July 2023, has the ability to test and differentiate the Friedman equation from timescape alternatives.”
“However, this will require at least 1,000 independent high-quality supernova observations.”
of study Published in Monthly Notices of the Royal Astronomical Society: Letters.
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antonia seifert others. 2025. Supernovae are evidence of fundamental changes in cosmological models. MNRASL 537 (1): L55-L60;doi: 10.1093/mnrasl/slae112
In 2003, Hubble provided evidence of giant exoplanets around very old stars. Such stars have only small amounts of the heavy elements that make up planets. This suggests that some planetary formation occurred when our universe was very young, and that those planets had time to form and grow large within the primordial disk, becoming even larger than Jupiter. I am. But how? To answer this question, astronomers used the NASA/ESA/CSA James Webb Space Telescope to study stars in the nearby Small Magellanic Cloud, which, like the early Universe, lacks large amounts of heavy elements. They discovered that not only do some stars there have planet-forming disks, but that those disks are longer-lived than the disks found around young stars in our Milky Way galaxy.
This web image shows NGC 346, a massive star cluster in the Small Magellanic Cloud. Yellow circles superimposed on the image indicate the positions of the 10 stars investigated in the study. Image credits: NASA/ESA/CSA/STScI/Olivia C. Jones, UK ATC/Guido De Marchi, ESTEC/Margaret Meixner, USRA.
“With Webb, we have strong confirmation of what we saw with Hubble, and we need to rethink how we model planet formation and early evolution in the young Universe.” European Space Research Agency said Dr. Guido de Marchi, a researcher at Technology Center.
“In the early universe, stars formed primarily from hydrogen and helium, with few heavier elements such as carbon or iron, and were later born from supernova explosions.”
“Current models predict that because heavy elements are so scarce, the lifetime of the disk around the star is short, so short that in fact planets cannot grow,” said a researcher at NSF's NOIRLab's Gemini Observatory. said lead scientist Dr. Elena Sabbi.
“But Hubble actually observed those planets. So what happens if the model is incorrect and the disks have a longer lifespan?”
To test this idea, the astronomers trained Webb in the Small Magellanic Cloud, a dwarf galaxy that is one of the closest galaxies to the Milky Way.
In particular, they examined the massive star-forming cluster NGC 346, which also has a relative lack of heavy elements.
This cluster served as a nearby proxy for studying stellar environments with similar conditions in the distant early universe.
Hubble observations of NGC 346 since the mid-2000s have revealed that there are many stars around 20 to 30 million years old that are thought to still have planet-forming disks around them.
This was contrary to the conventional idea that such disks would disappear after two or three million years.
“Hubble's discovery was controversial and went against not only the empirical evidence for the galaxy, but also current models,” Dr. De Marchi said.
“This was interesting, but without a way to obtain the spectra of these stars, we will not know whether what we are witnessing is genuine accretion and the presence of a disk, or just an artificial effect. I couldn't actually confirm it.”
Now, thanks to Webb's sensitivity and resolution, scientists have, for the first time, spectra of the formation of Sun-like stars and their surrounding environments in nearby galaxies.
“We can see that these stars are actually surrounded by a disk and are still in the process of engulfing material even though they are relatively old, 20 or 30 million years old,” De Marchi said. Ta.
“This also means that planets have more time to form and grow around these stars than in nearby star-forming regions in our galaxy.”
This discovery contradicts previous theoretical predictions that if there were very few heavy elements in the gas around the disk, the star would quickly blow away the disk.
Therefore, the lifespan of the disk is very short, probably less than 1 million years.
But how can planets form if dust grains stick together to form pebbles and the disk doesn't stay around the star long enough to become the planet's core?
The researchers explained that two different mechanisms, or a combination of them, may exist for planet-forming disks to persist in environments low in heavy elements.
First, the star applies radiation pressure to blow the disk away.
For this pressure to be effective, an element heavier than hydrogen or helium must be present in the gas.
However, the massive star cluster NGC 346 contains only about 10 percent of the heavy elements present in the Sun's chemical composition.
Perhaps the stars in this cluster just need time to disperse their disks.
A second possibility is that for a Sun-like star to form when there are few heavier elements, it would need to start with a larger cloud of gas.
As the gas cloud grows larger, it produces larger disks. Therefore, because there is more mass in the disk, it will take longer to blow it away, even if the radiation pressure is acting the same.
“The more material around the star, the longer the accretion will last,” Sabbi says.
“It takes 10 times longer for the disk to disappear. This has implications for how planets form and the types of system architectures that can be used in different environments. This is very exciting.”
of study Published today on astrophysical journal.
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Guido de Marchi others. 2024. Protoplanetary disks around Sun-like stars appear to live longer when they are less metallic. APJ 977,214;Doi: 10.3847/1538-4357/ad7a63
This article is adapted from an original release by the Webb Mission Team at NASA's Goddard Space Flight Center.
The newly discovered galaxy, called the Firefly Radiance, existed about 600 million years after the Big Bang and consisted of at least 10 star clusters.
The Firefly Sparkle galaxy is in the process of gathering and forming new stars, exists about 600 million years after the Big Bang, and would weigh about the same as the Milky Way if we could turn back the clock and watch the galaxy develop . Image credits: NASA / ESA / CSA / STScI / C. Willott, NRC-Canada / L. Mowla, Wellesley College / K. Iyer, Columbia.
The most distant galaxies detected date from when the universe was about 5% of its current age.
However, the mass of these galaxies is about 10,000 times smaller than that of the Milky Way, making them difficult to observe.
The Firefly Sparkle galaxy was first observed by the NASA/ESA Hubble Space Telescope, but detailed new observations by the NASA/ESA/CSA James Webb Space Telescope shed more light on its formation.
“We never thought it would be possible to resolve galaxies that existed so early in the universe into so many different components, much less that their mass would be comparable to the mass of our galaxy in the process of forming. “I never thought it would be possible to discover similarities between the two,” he said. Dr. Ramiya Moura, astronomer at Wellesley College.
“There’s so much going on inside this small galaxy, including various stages of star formation.”
Webb was able to image the Firefly Sparkle galaxy in sufficient detail for two reasons.
One is the blessings of the universe. A massive galaxy cluster in the foreground, called MACS J1423.8+2404, radically enhanced the appearance of distant galaxies through a natural effect known as gravitational lensing.
And when combined with the telescope’s specialization in high-resolution imaging in infrared light, Webb provided unprecedented new data on the contents of galaxies.
“Without the benefit of this gravitational lensing, we would not have been able to understand this galaxy,” said Columbia University astronomer Karltej Ayer.
“We knew that was expected based on current physics, but to actually witness it was surprising.”
Astronomers also observed two neighboring galaxies they named Firefly Best Friend and Firefly New Best Friend. These galaxies are located 6,000 and 40,000 light-years from Firefly Sparkle, respectively, and are smaller than the present-day Milky Way.
The authors propose that the firefly glow could be a young, gas-rich galaxy in the early stages of formation.
These show that Firefly Sparkle’s mass is concentrated in 10 star clusters, with a total mass about 10 million times the mass of the Sun.
As such, Firefly Sparkle is one of the lowest-mass galaxies to have resolved into star clusters observed at the dawn of the universe, when galaxies began to form, and its mass is similar to that of the progenitor Milky Way. is.
“It has long been predicted that galaxies in the early universe formed through continuous interactions and mergers with other smaller galaxies,” says Yoshihisa Asada, a doctoral student at Kyoto University.
“We may be witnessing this process in action.”
“We have just started using space microscopy, so this is only the first of many such galaxies that Webb will discover,” said Dr. Marcia Bradač, an astronomer at the University of Ljubljana.
“Just as we can see pollen grains on plants with a microscope, the incredible resolution of the Webb and the magnifying power of gravitational lenses allows us to see tiny pieces inside galaxies.”
“Our team is currently analyzing all the early galaxies, and the results all point in the same direction. We still don’t know much about how these early galaxies formed. .”
L. Mora others. 2024. Low-mass galaxies were formed from star clusters in the Universe 600 million years ago. nature 636, 332-336; doi: 10.1038/s41586-024-08293-0
In 1961, American astrophysicist and astrobiologist Dr. Frank Drake multiplied several factors to estimate the number of intelligent civilizations in the Milky Way that could make their presence known to humans. I devised an equation. More than 60 years later, astrophysicists have created a different model that focuses instead on conditions created by the accelerating expansion of the universe and the amount of stars forming. This expansion is thought to be caused by dark energy, which makes up more than two-thirds of the universe.
Artistic impression of the multiverse. Image credit: Jaime Salcido / EAGLE collaboration.
“Understanding dark energy and its impact on our universe is one of the biggest challenges in cosmology and fundamental physics,” said Dr. Daniele Solini, a researcher at Durham University’s Institute for Computational Cosmology. .
“The parameters that govern our universe, such as the density of dark energy, may explain our own existence.”
Because stars are a prerequisite for the emergence of life as we know it, the team’s new model predicts the probability of intelligent life arising in our universe, and in a hypothetical multiverse scenario of different universes. could be used to estimate the
The new study does not attempt to calculate the absolute number of observers (i.e. intelligent life) in the universe, but instead calculates the relative probability that a randomly chosen observer will inhabit a universe with certain properties. will be considered.
It concludes that a typical observer would expect to experience significantly greater densities of dark energy than seen in our Universe. This suggests that its ingredients make it a rare and unusual case in the multiverse.
The approach presented in this paper involves calculating the rate at which ordinary matter is converted into stars for different dark energy densities throughout the history of the universe.
Models predict that this proportion would be about 27% in a universe where star formation is most efficient, compared to 23% in our universe.
This means that we do not live in a hypothetical universe where intelligent life has the highest probability of forming.
In other words, according to the model, the values of dark energy density that we observe in the Universe do not maximize the potential for life.
“Surprisingly, we found that even fairly high dark energy densities can still coexist with life. This suggests that we may not be living in the most likely universe. ,” Dr. Solini said.
The model could help scientists understand how different densities of dark energy affect the structure of the universe and the conditions for life to develop there.
Dark energy causes the universe to expand faster, balancing the pull of gravity and creating a universe that is capable of both expansion and structure formation.
But for life to develop, there needs to be areas where matter can aggregate to form stars and planets, and conditions need to remain stable for billions of years to allow life to evolve.
Importantly, this study shows that the astrophysics of star formation and the evolution of the large-scale structure of the universe combine in subtle ways to determine the optimal value of dark energy density required for the generation of intelligent life. It suggests that.
“We will use this model to investigate the emergence of life across different universes and reinterpret some fundamental questions we ask ourselves about our own universe,” said Lucas Lombreiser, professor at the University of Geneva. It will be interesting to see if there is a need.”
of study Published in Royal Astronomical Society Monthly Notices.
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Daniele Solini others. 2024. Influence of the cosmological constant on past and future star formation. MNRAS 535 (2): 1449-1474;doi: 10.1093/mnras/stae2236
Astronomers using the NASA/ESA/CSA James Webb Space Telescope have determined that within the first billion years after the Big Bang, three supermassive galaxies with a mass roughly the same as our own Milky Way already existed. I discovered that there is. The discovery, part of the JWST/FRESCO survey, shows that stars in the early universe grew much more rapidly than previously thought, casting doubt on existing models of galaxy formation.
Three red monster galaxies discovered by Webb. Image credits: NASA / CSA / ESA / M. Xiao & PA Oesch, University of Geneva / G. Brammer, Niels Bohr Institute / Dawn JWST Archive.
Until now, it was thought that all galaxies formed gradually within large halos of dark matter.
Dark matter halos trap gas (atoms and molecules) in gravitationally bound structures.
Typically, up to 20% of this gas is converted into stars within a galaxy.
But new discoveries cast doubt on this view, revealing that giant galaxies in the early universe may have grown much more rapidly and efficiently than previously thought.
“The problem of ‘impossible’ giant galaxies in the aftermath of the Big Bang has puzzled astronomers since the first images of the web,” said Dr Ivo Rabe, an astronomer at Swinburne University of Technology.
“This is like finding a 100 kg infant. Webb has proven that monsters roam the early universe.”
While most of the sources found in the FRESCO survey fit existing models, astronomers also discovered three surprisingly massive galaxies with stellar masses comparable to today’s Milky Way galaxy. .
They are named “red monsters” because of their high dust content and their distinctive red color in web images.
These form stars nearly twice as efficiently as their subsequent lower-mass counterparts and galaxies.
“These findings raise new questions about galaxy formation theory, especially the problem of ‘too many, too big’ galaxies in the early Universe,” said Dr. Rabe.
“Current models cannot explain why star formation occurs so efficiently so early in the universe.”
“The general assumption is that an exploding star or a supermassive black hole kills star formation and blows out the candle.”
“I have no doubt that future observations of the web will provide clues about what we are missing.”
Professor Stein Weitz, an astronomer at the University of Bath, said: “Finding three such gigantic beasts among the specimens poses an interesting puzzle.”
“Many processes of galactic evolution tend to introduce rate-limiting steps in how efficiently gas turns into stars, but somehow this red monster quickly bypassed most of these hurdles. It seems there is.”
“These results show that galaxies in the early Universe may form stars with unexpected efficiency,” said Dr. Mengyuan Xiao, an astronomer at the University of Geneva.
“Studying these galaxies in more detail will provide new insights into the conditions that shaped the early days of the universe.”
“The Red Monster is just the beginning of a new era in the exploration of the early universe.”
“That’s the great thing about astronomy: we’re always surprised by new discoveries,” Professor Weitz said.
“Already in the first few years, Webb has thrown us some curveballs.”
“In multiple ways, we show that some galaxies mature rapidly during the first chapters of the universe’s history.”
a paper Survey results are published in a magazine nature.
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M. Xiao others. The formation of supermassive galaxies accelerates during the first billion years. naturepublished online on November 13, 2024. doi: 10.1038/s41586-024-08094-5
The Standard Model predicted that the NASA/ESA/CSA James Webb Space Telescope would observe a faint signal from a small protogalaxy. However, the common hypothesis that invisible dark matter contributed to the clumping of early stars and galaxies is not supported by the data. In fact, a new study led by astrophysicists at Case Western Reserve University says that the fact that the oldest galaxies are larger and brighter is consistent with another theory of gravity.
This artist's impression shows the evolution of the universe, starting with the Big Bang on the left and continuing with the emergence of the Cosmic Microwave Background. The formation of the first stars ends the Dark Ages of the universe, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.
“What dark matter theory predicts is not what we're seeing,” says Case Western Conservancy Professor Stacey McGaw.
“Instead of dark matter, modified gravity may have played a role. A theory known as MOND (Modified Newtonian Mechanics) proposed in 1998 that structure formation in the early universe would have occurred very quickly. It's much faster than the cold dark matter theory known as lambda CDM predicted.
The Webb is designed to answer some of the universe's biggest questions, such as when and how stars and galaxies formed.
Until its launch in 2021, there was no telescope that could peer deep into space and far back in time.
Lambda CDM predicts that galaxies formed by the gradual accretion of matter from smaller structures to larger structures due to the extra gravity provided by the mass of dark matter.
“Astronomers invented dark matter to explain how we went from a very smooth early universe to the large galaxies we see today with lots of space in between.” Professor McGough said.
Smaller pieces clustered into larger structures until galaxies formed. Webb should be able to see these tiny galaxy precursors as dim lights.
“All the large galaxies we see in the nearby universe were expected to have started from these tiny pieces,” Professor McGough said.
But even at higher and higher redshifts, the signal is larger and brighter than expected, even from this early stage of the universe's evolution.
MOND predicted that the mass that would become galaxies would rapidly aggregate and initially expand outward with the rest of the universe.
The stronger gravity slows the expansion, which then reverses and the matter collapses on itself to form galaxies. In this theory, dark matter does not exist at all.
“The large, bright structures that Webb saw in the very early days of the universe were predicted by MOND more than a quarter of a century ago,” Professor McGough said.
“The bottom line is, “I told you so.'' I was raised to think it was rude to say that, but that's the whole point of the scientific method, to make predictions and find out which ones. Let's see if it becomes a reality.”
“Finding a theory that fits both MOND and general relativity remains a major challenge.”
Stacey S. McGaw others. 2024. Accelerating structure formation: The early emergence of massive galaxies and galaxy clusters. APJin press. arXiv: 2406.17930
This article is a version of a press release provided by Case Western Reserve University.
The 7.2 million solar mass black hole, named LID-568, appears to be feeding on matter 40 times faster than the Eddington limit and is thought to have existed just 1.5 billion years after the Big Bang.
An artist's impression of the accreting black hole LID-568 in the early universe. Image credit: NOIRLab / NSF / AURA / J. da Silva / M. Zamani.
eddington limit The maximum brightness a black hole can achieve is related to the rate at which a black hole can absorb matter, such that the inward gravitational force is balanced with the outward pressure generated from the heat of the compressed and falling matter. I will.
LID-568 appears to be feeding on matter at a rate 40 times faster than the Eddington limit.
This accreting black hole was detected by the NASA/ESA/CSA James Webb Space Telescope in a sample of galaxies from the COSMOS Legacy Survey of Chandra.
This galaxy population is very bright in the X-ray part of the spectrum, but invisible in the optical and near-infrared.
Webb's unique infrared sensitivity allows it to detect these weak corresponding emissions.
LID-568 stood out in the sample for its strong X-ray emissions, but its exact location could not be determined using X-ray observations alone.
So instead of using traditional slit spectroscopy, Webb's measurement support scientists suggested that the study authors use an integral field spectrometer. Web's NIRSpec (near infrared spectrometer) equipment.
“Due to its faint nature, detection of LID-568 would be impossible without Webb,” said Dr. Emanuele Farina, an astronomer at the International Gemini Observatory and NSF's NOIRLab.
“The use of an integral field spectrometer was innovative and necessary to obtain the observations.”
“This black hole is having a party,” said Dr. Julia Schallwechter, also of the International Gemini Observatory and NSF's NOIRLab.
“This extreme case shows that a fast-feeding mechanism that exceeds the Eddington limit is one possible explanation for why we see these extremely massive black holes in the early universe.”
These results provide new insights into the formation of supermassive black holes from smaller black hole “seeds.” Until now, theories have lacked observational support.
“The discovery of super-Eddington accretion black holes suggests that, regardless of the black hole's origin as a light or heavy seed, a significant portion of the mass growth can occur during a single episode of rapid feeding. “This suggests something,” said Dr. Hyewon Seo. Also provided by the International Gemini Observatory and NSF's NOIRLab.
“The discovery of LID-568 also shows that black holes can exceed the Eddington limit, giving astronomers the first opportunity to study how this happens,” the astronomers said. .
“The strong outflow observed on LID-568 may act as a release valve for excess energy generated by extreme accretion, preventing the system from becoming too unstable.”
“The team plans a follow-up study with Mr. Webb to further investigate the mechanisms involved.”
Their result Published in today's diary natural astronomy.
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Sue H others. A super-Eddington accretion black hole observed by JWST about 1.5 Gyr after the Big Bang. Nat Astronpublished online on November 4, 2024. doi: 10.1038/s41550-024-02402-9
This article is based on a press release provided by NSF's NOIRLab.
The existence of something rather than nothing is a profound question that lies at the intersection of science and philosophy. It pushes us to investigate the origins of our existence.
Evolutionary theory traces all life on Earth back to a common ancestor referred to as the Last Universal Common Ancestor (LUCA). The quest to find LUCA captivates scientists studying life’s origins, prompting a deeper exploration into the origins of Earth and the universe.
Cosmologically, the birth of stars, formation of planets, and expansion of the universe reveal a magnificent interplay. This cosmic dance involves the expansion rate of the universe, gravitational collapse of dark matter, and the capture of hydrogen essential for star formation. Without this intricate cosmic ballet, life as we know it would not exist.
The story of our universe begins with a fundamental question: What sparked the universe’s expanding space-time? The prevailing model, known as big bang cosmology, posits that all matter in the universe originated from a colossal explosion at a specific point in the distant past.
Einstein’s general relativity theory supports the concept of an expanding universe, describing space-time as a flexible medium capable of bending, expanding, and collapsing. Rewinding the universe would reveal a moment called the Big Bang Singularity, where the universe condensed into a minuscule point of immense energy and curvature.
Stephen Hawking and his colleagues delved into understanding this singularity, grappling with the notion of time and existence before the Big Bang. Alternative explanations beyond the singularity have been explored, including concepts like the big bounce, quantum gravity, and cyclical inflation.
Cosmologists are actively researching observational predictions to differentiate between these models and unravel the mysteries of our cosmic origins. The rapid formation of supermassive black holes challenges the current cosmological model, hinting at the need for new frameworks to explain cosmic anomalies.
As we continue this intellectual journey, uncovering the enigmatic tapestry of the universe, we inch closer to unravelling the secrets of our existence and shedding light on the age-old question of why there is something rather than nothing.
WOne of the first indie game superstars of the 2000s, Derek Yu started designing games on graph paper with his friend John Perry while still a student. When Yu’s first major success, “cave exploration,” became a hit, he and Perry decided to collaborate once again, this time as men in their 40s. This heartwarming backstory is reflected in UFO50, an ambitious collection of 50 games. The narrative structure was crafted by a fictional game company during the years of 1982 to 1989. Each game in UFO50 features the nostalgic Atari 2600 and NES aesthetics with chunky sprites and a retro chiptune soundtrack, but incorporates modern design elements to bring a fresh twist to the retro style.
Why 50 games? No one knows for sure. But Yu and Perry, along with their supportive developer friends, showcased their design talents across a variety of genres, both familiar and completely innovative. One standout is “party house,” where players must balance a mix of guests to throw the ultimate house party, scoring points based on the success of the event. Other games in the collection include “night manners,” a point-and-click horror story, “bushido ball,” an Edo period themed game similar to Pong, and “rail robbery,” a stealth action game where players take on the role of an outlaw robbing trains.
Creating 50 games was a daunting task for Yu and Perry, requiring immense dedication and effort. The end result of UFO50 is a testament to their creativity and highlights the vast possibilities within the realm of game design, even in the simplest looking games.
Evidence of antimatter in cosmic rays has been discovered by scientists, suggesting the potential existence of a new type of particle. These particles could be a part of dark matter, a mysterious substance that makes up 85 percent of the universe’s mass but has never been directly observed.
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A recent study indicates that antihelium particles, the antimatter form of helium, detected by instruments on the International Space Station may have originated from a new class of weakly interacting massive particles (WIMPs). It is believed that dark matter could be made up of WIMPs.
“WIMP is a theoretical particle that could potentially be a perfect candidate for dark matter,” explained lead author Pedro de la Torre Luque, a physicist supporting research at the Institute of Theoretical Physics in Madrid. “Many proposed models have been ruled out, leaving only a few surviving theories.”
The antihelium core observed during cosmic ray research on the space station’s alpha magnetic spectrometer (AMS-02) may have been the result of two WIMPs colliding and annihilating each other. This collision could have generated matter, antimatter, and energy.
Antimatter is essentially the “mirror image” of normal matter, with the same mass but opposite properties such as charge.
While some antimatter may have been created during the Big Bang, researchers believe that additional antimatter is continuously generated by specific cosmic events, although it is challenging to observe.
“The observation of antihelium was thrilling because it indicates an unusual phenomenon occurring in the interstellar medium, where the production of antiparticles is unexpected,” stated De La Torre Luque.
“Theoretical forecasts suggest that even though cosmic rays interact with interstellar gas to produce antiparticles, the presence of antinuclei, particularly antihelium, should be extremely rare.”
“We anticipated discovering an antihelium event once every few decades, but the approximately 10 antihelium events observed by AMS-02 resulted from standard cosmic ray interactions. Therefore, these antihelium occurrences provide a promising clue to WIMP annihilation.”
Using the Atacama Large Millimeter/submillimeter Array (ALMA) and the Subaru Telescope, astronomers have discovered a merging pair of gas-rich galaxies that existed 12.8 billion years ago and housed a faint central quasar that may be the ancestor of some of the brightest and most massive quasars in the early universe.
Artist's impression of the quasars HSC J121503.42-014858.7 and HSC J121503.55-014859.3. Image courtesy of Izumi others., doi:10.3847/1538-4357/ad57c6.
Quasars are luminous objects that gained energy from matter falling into supermassive black holes at the centers of galaxies in the early universe.
The most accepted theory is that when two gas-rich galaxies merge to form one larger galaxy, the gravitational interaction between the two galaxies causes gas to fall towards a supermassive black hole in one or both of the galaxies, triggering quasar activity.
To test this theory, Dr. Takuma Izumi of the National Astronomical Observatory of Japan used ALMA to study the oldest known pair of close quasars.
The quasars, named HSC J121503.42-014858.7 and HSC J121503.55-014859.3, were discovered by the Subaru Telescope's Hyper Suprime-Cam.
These objects are very faint, about 10 to 100 times fainter than highly luminous quasars at the same redshift.
“It is located approximately 12.8 billion light-years away, corresponding to the 'cosmic dawn' era when the universe was only 900 million years old, making it the farthest such quasar pair on record,” the astronomers said.
“Because of their faintness, we thought these objects were in the pre-merger stage, before the supermassive black holes rapidly grow.”
“However, observations with the Subaru Telescope only provide information about the central supermassive black hole, and it remains unclear whether the host galaxy is destined to merge and ultimately grow into a luminous quasar.”
“As a next step, we used the ALMA radio telescope to carry out observations of the host galaxies of these quasar pairs.”
“The results were surprising: the observed distribution of interstellar material and the nature of its motions indicated that these galaxies are interacting with each other.”
“They are definitely on a path to merge into one galaxy in the near future.”
“Furthermore, calculations from observational data reveal that the total gas mass of these galaxies – about 100 billion times the mass of the Sun – is comparable to or exceeds the gas mass in the host galaxies of most luminous quasars, which have extremely bright cores.”
“This enormous amount of matter should easily trigger and sustain the post-merger burst of star formation and fueling of the supermassive black hole.”
“These discoveries therefore represent a significant achievement in identifying the ancestors of luminous quasars and starburst galaxies, the most luminous objects in the early universe, from various perspectives, including galactic structure, motion and the amount of interstellar material.”
Takuma Izumi others2024. Gas-rich galaxy merger harboring a low-luminosity twin quasar at z = 6.05: a likely progenitor of the most luminous quasars. ApJ 972, 116;doi:10.3847/1538-4357/ad57c6
HHow do you follow up on a game that made the world cry? It’s a question that’s vexed writer Graham Parks since his 2021 BAFTA-winning Before Your Eyes. Released during the height of lockdown, Parks’ webcam-controlled story uses the player’s blinks to fast-forward through protagonist Benny’s memories, blinking through each uplifting and heartbreaking moment of his existence. It quickly gained a reputation as Twitch’s tearjerker, its moving story and the misery of the pandemic’s last few months creating a perfect, tissue-paper-shredding storm. “As a writer, it was definitely a scary thing,” Parks says. “I’m interested in using games to tell concise, emotional stories, but I can’t say they’re going to make you cry every time.”
Still, tears or no tears, things are already looking pretty promising for Goodnight Universe, an intriguing sequel to Before Your Eyes. Developed by Nice Dream, an all-new studio founded by creators Graham Parks and Oliver Lewin, Goodnight Universe has already won the 2024 Game of the Year award at the TriBeCa Film Festival, beating out the excellent Thank Goodness You’re Here!
So moving…Goodnight universe Photo: Nice Dream
What’s the premise of Goodnight Universe? “It’s a game where you play as a baby with psychic powers,” Parks says with a coy laugh. Using a webcam or a VR headset, players step inside the tiny body of baby Isaac, who begins to develop mysterious abilities. The slithering psychic must grasp his rapidly blossoming new powers and use his eyes to bend the vast world around him to his will – preferably without scaring Isaac’s poor parents, Parker explains.
“Before Your Eyes was a game about disempowering the player,” Parks says, “but we always felt that mechanics like blinking and eye tracking could also be used to empower the player and give them a sense of magic.”
Second grade angst…Goodnight universe. Photo: Nice Dream
Sounding more like Boss Baby than indie darling, Goodnight Universe’s storyline was definitely a tonal shift, and one that took the team a while to realise. “We had been anxious about the second album for a really long time,” Parks says. “We even had to make a rule in ideation sessions that we couldn’t even talk about ‘Before Your Eyes’.”
Luckily, inspiration struck from a new face in the room. “Our lead designer, Bella, had just had her first child,” says Parks. “She started coming into meetings and was at an age where you’d sit down and she’d just stare at one thing for an hour and you’d forget she was there. We’d become known as people who make games that don’t move around a lot… I noticed her quietly staring at me, and that was my ‘Oh, noooo!’ moment.” Goodnight Universe was born.
From kinetically changing TV channels to sending wooden blocks flying, Goodnight Universe takes players on Isaac’s strange but heartwarming journey to understand his powers, be accepted by his family, and avoid being kidnapped by a shady tech company. The diaper-clad protagonist is voiced by Top Gun Maverick’s Lewis Pullman, and the supporting cast includes actors from TV shows like Veep, Barry, and The Daily Show, and the LA studio cleverly takes advantage of its proximity to Hollywood.
“Many indies [the union] “Some actors only do film or TV,” adds the game’s director and composer Oliver Lewin, “but the truth is, these actors are really excited about this.”
Thanks to its BAFTA win, Before Your Eyes has transcended its webcam origins, making its way to PlayStation VR2 and joining Netflix’s steadily growing library of mobile games. But while you can play Goodnight Universe in VR and turn off face tracking, for Lewin, the game’s story is still tied to the humble webcam. “For us, the face-tracking technology is there to enhance immersion,” Lewin says. [few] Developers are researching this…There’s a lot you can do with just a simple webcam, and everyone has one.”
“Our game is, in many ways, a playable movie,” Parks adds. “I think what motivates us more than any exciting controls is how we can use this medium to tell a story in an interesting and unique way.”
In a medium that revolves around slaying dragons, crushing demons and embarking on intergalactic power fantasies, there’s something fresh and quaint about Goodnight Universe, but after shedding a fair few tears over Before Your Eyes, if anyone can do justice to this strange premise, it’s the quirky LA Art Games collective.
Black holes have the ability to die, but this process happens very slowly and in a rather normal manner.
Despite appearing empty, space is not entirely devoid of mass or energy. Within this space, there exist “quantum fields” that give definition to mass and energy. These fields do not necessarily have zero energy, allowing for the creation of pairs of “virtual particles” (typically particle and antiparticle pairs) that quickly eliminate each other.
Another common explanation is that near a black hole, one of these particles may vanish inside the black hole while the other escapes as “Hawking radiation.”
In order to maintain the total energy of a black hole, incoming particles must possess “negative energy” (hence “negative mass”) while escaping particles must have positive energy.
Hawking radiation is a result of gravity’s impact on space-time. Quantum fields within empty space adhere to the Heisenberg uncertainty principle, limiting our understanding of the energy of a quantum field or the duration for which we can attribute a specific energy to it.
Since gravitational fields influence the curvature of space-time and the flow of time in a given area, regions of space-time with varying gravitational curvatures struggle to agree on the energy of the quantum field.
The variance in vacuum energy within different points of a black hole’s gravitational field creates what are known as “virtual particles.”
As positive energy escapes from a black hole, the mass and energy of the black hole gradually diminish, causing a black hole that is not actively attracting new material to gradually shrink and ultimately vanish.
However, this process occurs over massive time scales. For instance, a black hole with the mass of the sun would take 1064 years to evaporate, far surpassing the age of the universe at 10 years old.
This article endeavors to answer Catrin Phelps of Winchester’s question, “Can black holes ever die?”
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MaAsteroids hurtling at planet-destroying speeds, glowing spheres of hot gas, black holes from which even light cannot escape: outer space can be the stuff of nightmares, but for Celine Veltman, a 28-year-old Dutch game maker who spent her childhood stargazing, it’s the stuff of dreams. She’s channeling this cosmic wonder into a video game with the most ambitious ambition: the creation of a solar system. Rocks collide with each other, chemical reactions occur, and planets and life itself are born in the depths of space.
Curiosmos’s bright, easy-to-follow visuals, more children’s picture book than Terrence Malick, express Veltman’s objectives for the project and its inception: “I want to inspire more people to become as passionate about space as I am,” she says, speaking animatedly of supernovae and protoplanetary disks.
The idea came to Veltman while she was visiting a friend with two young children in 2018. The kids begged the developer for an iPad, so Veltman came up with what she wanted them to play: a “silly” game about astronomy, one that would “make them laugh” while also teaching a lesson about the very building blocks of life.
Speaking to a backdrop of sculptures on shelves in his artist studio in Utrecht, Netherlands, Veltman explains that this whimsical space adventure relies on solid physics and programming from his colleagues Guillaume Pauli and Robin de Paeppe. Curiosmos is a game of interlocking systems that produce unpredictable outcomes: an asteroid blows off parts of the planet to expose a molten core, drifting clouds create the perfect conditions for plant life, and strange, ungainly creatures begin to waddle around. There are touches of 2008’s Spore in this primitive life simulator, but Veltman specifically references the games of renowned designer Keita Takahashi (specifically Noby Noby Boy and Wattam) for working with “goofy, unconventional concepts.”
The task of translating the universe’s almost unfathomably complex secrets into gameplay proved to be a challenge. “Sometimes I almost regret it,” says Veltman, who relied on her instincts about what key information to include, leaving out magnetic fields and including rings of debris. Ultimately, she says with a wry smile, people need to understand that “planets are fragile, and can turn into big piles of dust.”
While the subject matter might evoke a touch of existential dread, Curiosmos is designed to feel good in the player’s hands. “That was a big part of the design,” Veltman says. Hurling asteroids makes satisfying noises, and terrain explodes with satisfying sounds. Veltman, a hobbyist potter, understands the power of touch; even Curiosmos’s transforming planets look like they’re made of clay.
Curiosmos also has personal meaning for Veltman: “During development, I realized I was saddened to be an artist instead of a scientist,” she says. The game is her attempt to ease this tension and “give meaning to science by creating art.”
Veltman hopes it will have the same kind of impact, if not the same scale, as educational YouTube channels. In a nutshell“The astronomy community is a huge part of our lives,” Veltman says. “They’re the foundation of our planet. They’re the cornerstone of our planet’s astronomy.” Veltman is a scientist who translates arcane scientific concepts into videos of “optimistic nihilism” for his 22.5 million subscribers. Curious Moss has a similar energy, seeking to make the universe’s most remote, strange, and unsettling mysteries “accessible to everyone.” Perhaps this, Veltman thinks, could pique the curiosity of many new astronomy enthusiasts.
This story is part of our “Cosmic Perspective” series, which confronts the incredible vastness of the universe and our place in it. Read the rest of the series here.
This map shows the cosmic ring that surrounds us, stretching out to distances of up to 200 million light-years. At this scale, the universe is made up of galaxy clusters and voids, the latter being regions with relatively few galaxies. The Milky Way at the center is part of the Local Group, while the Virgo Cluster is our nearest neighbour.
The magnificent spiral
The Milky Way’s spiral structure is dominated by two major arms called Scutum-Centaurus and Perseus. It also features a dense region called the central bar. Our solar system sits on a more modest structure called the Orion Arm.
No matter how complex the questions about our metaphorical place in the universe, astronomy can help us understand Earth’s physical location.
Earth orbits at a distance of 150 million kilometers from the Sun, which in turn orbits the center of the Milky Way galaxy. Specifically, Earth is located in the Orion Arm, about 26,500 light years from the center.
The Milky Way Galaxy is part of the Local Group of galaxies. Its nearest neighbor, the Andromeda Galaxy, is about 2.5 million light-years away and is the largest galaxy in the Local Group. We are currently hurtling towards the Andromeda Galaxy at over 100 kilometers per second, and in about 4 billion years the two galaxies will collide.
Local Groups
It will shake up local groups, but it will barely be on the radar of the wider cosmic neighborhood.
An astrophysicist and a surgeon walk into a bar. No, this is not the start of a bad joke. A few years ago, an astrophysicist Franco Vazza I met my childhood friend Alberto FerrettiAnd then he became a neurosurgeon. Vazza was modeling the structure of the universe, while Ferretti was delving into the brain. The two men reminisced and talked about their work. And then an idea occurred to them: What if they compared?
Vazza, based at the University of Bologna in Italy, has done just that. He used statistical techniques to compare neurons in a region of the brain called the cortex to the cosmic web, the pattern of matter distribution throughout the universe. Vazza looked at the number of nodes in each network and how densely connected each node is. The results surprised him.“It's a really interesting level of similarity,” he says. Ignoring the difference in the structures' sizes, which are about 27 orders of magnitude, “the two patterns kind of overlap,” Vazza says.
Some physicists cannot ignore this similarity, suggesting that the universe may “think” – that is, be conscious in some sense – an idea that has roots in the philosophy of panpsychism.
Traditionally, researchers have explained consciousness in one of two ways. Materialists argue that there is only matter, and consciousness somehow arises from that. Dualists argue that there are fundamentally two kinds of matter: matter and consciousness. There has been much discussion about the shortcomings of both views. For example, how can consciousness arise from pure matter?
Astronomers using the NASA/ESA/CSA James Webb Space Telescope have discovered at least five young globular clusters within SPT 0615-JD1 (also known as the Cosmic Gems Arc), a strongly lensed galaxy that existed when the universe was 460 million years old.
These images show the galaxy cluster SPT-CL J0615-5746 (right) and part of this cluster (left), showing two clearly lensed galaxies. The Cosmic Gems arc is shown along with several galaxy clusters. Images courtesy of NASA / ESA / CSA / Webb / L. Bradley, STScI / A. Adamo, Stockholm University / Cosmic Spring Collaboration.
“These galaxies are thought to be the main source of intense radiation that reionized the early universe,” said Dr Angela Adamo, astronomer at Stockholm University and the Oskar Klein Centre.
“What’s special about the Cosmic Gems Ark is that thanks to gravitational lensing, we can actually resolve galaxies down to the parsec scale.”
SPT 0615-JD1 was originally discovered in Hubble Space Telescope images obtained by the RELICS (Reionizing Lensing Cluster Survey) program of the lensing galaxy cluster SPT-CL J0615-5746, located about 7.7 billion light-years away in the constellation of Scorpio.
The Webb telescope will enable Dr Adamo and his colleagues to see where stars are forming and how they are distributed, in a similar way that the Hubble telescope is used to study the local galaxy.
Webb’s observations provide a unique opportunity to study star formation and the internal structure of young galaxies at unprecedented distances.
“The combination of the Webb Telescope’s incredible sensitivity and angular resolution at near-infrared wavelengths, along with gravitational lensing by a large foreground galaxy cluster, made this discovery possible that would not have been possible with any other telescope,” said Dr. Larry Bradley, an astronomer at the Space Telescope Science Institute.
“The surprise and excitement I felt when I first opened the Webb images was overwhelming,” Dr. Adamo said.
“We saw a string of tiny bright dots projected from one side to the other. These cosmic gems are star clusters.”
“Without Webb, we would never have known we were observing star clusters in such a young galaxy.”
Astronomers say the discovery connects different scientific disciplines.
“These results provide direct evidence of the formation of protoglobular clusters in faint galaxies during periods of reionization and help us understand how these galaxies successfully reionized the Universe,” Dr Adamo said.
“This discovery also places important constraints on the formation of globular clusters and their early properties.”
“For example, the high stellar densities found in galaxy clusters provide the first indications of processes occurring within them and give new insights into the possible formation of very massive stars and black hole seeds that are important for the evolution of galaxies.”
In the future, the team hopes to construct a sample of galaxies that can achieve a similar resolution.
“I am convinced that there are more such systems in the early universe waiting to be discovered, which will improve our understanding of early galaxies even further,” said Dr Eros Vanzella, astronomer at the Bologna Observatory for Astrophysics and Space Sciences (INAF).
A. Adamo othersA bound star cluster observed in a lensed galaxy 460 million years after the Big Bang. NaturePublished online June 24, 2024, doi: 10.1038/s41586-024-07703-7
Many of the circled objects represent previously unknown supernovae.
Collaboration between NASA, ESA, CSA, STScI and JADES
Astronomers using the James Webb Space Telescope (JWST) have discovered a surprising number of supernovae in the distant universe, including some of the most distant yet seen. Their discoveries increase the number of known supernovae in the early universe by a factor of ten.
The researchers imaged the same small patch of sky twice, in 2022 and 2023, and found 79 new supernovae. “It’s actually very small, about the size of a grain of rice held at arm’s length,” the researchers said. Christa DeCourcy “We’ve spent more than 100 hours on JWST,” said Dr. [observing] I took my time with each image, which gives them a lot of depth.”
Astronomers then compared the two images with each other and with previous photos of the same area taken by the Hubble Space Telescope, looking for bright spots that appear in one image but not the other.
These specks are relatively faint stars that shone brightly before fading in bright supernova explosions. Some of them are candidates for the most distant supernovae ever found, although their distances have yet to be confirmed. And one of them is definitely the most distant one ever seen. This star exploded when the universe was only about 1.8 billion years old.
Such supernovae would have produced the heavy elements that are now widespread throughout the universe, so they would have had lower concentrations of these elements than modern supernovae. “The universe at this early stage was fundamentally different from what has been explored in the past by the Hubble Space Telescope and especially ground-based surveys,” he said. Justin Pierre “This is really new territory that JWST is breaking into,” he said during a presentation at the Space Telescope Science Institute in Maryland, where observations could help shed light on what the first stars were like.
in paper Published in Journal of Cosmology and Astroparticle PhysicsScientists have considered theoretical and observational cases of “cosmic glitches” in the universe's gravity.
Wen other. Specifically, we develop a model that modifies general relativity on a cosmological scale by introducing a "glitch" in the gravitational constant between the cosmological (superhorizon) and Newtonian (subhorizon) regions. Research. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.
For the past 100 years, physicists have relied on Albert Einstein's theory of general relativity to explain how gravity acts throughout the universe.
General relativity, proven accurate by countless experiments and observations, suggests that gravity affects not just the third physical dimension, but also a fourth dimension: time. Masu.
“This gravity model has been essential to everything from theorizing the Big Bang to photographing black holes,” said Robin Wen, a researcher at the California Institute of Technology.
“But when we try to understand gravity at the cosmic scale, beyond galaxy clusters, we run into clear contradictions with the predictions of general relativity.”
“It's as if gravity itself is no longer fully consistent with Einstein's theory.”
“We call this contradiction a 'cosmic glitch.' When dealing with distances of billions of light years, gravity weakens by about 1%.”
For more than 20 years, researchers have been trying to create a mathematical model to explain the apparent contradictions in general relativity.
“Almost a century ago, astronomers discovered that the universe was expanding,” said Professor Nyaesh Afsholdi of the University of Waterloo.
“The further away a galaxy is, the faster it is moving, so much so that it appears to be moving at a speed close to the maximum speed of light allowed by Einstein's theory.”
“Our findings suggest that at precisely that scale, Einstein's theory may also be inadequate.”
The research team's “cosmic glitch” model modifies and extends Einstein's formula in a way that resolves some discrepancies in cosmological measurements without affecting existing successful uses of general relativity. This is what I did.
“Think of this as a footnote to Einstein's theory,” Wen says.
“Once we reach the cosmic scale, terms and conditions apply.”
“This new model may be the first clue to the cosmic puzzles we are beginning to solve across time and space,” Professor Afshodi said.
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Robin Y. Wen other. 2024. Anomalies in the gravity of the universe. JCAP 03:045; doi: 10.1088/1475-7516/2024/03/045
Discovered by chance in 2019, Odd radio circles (ORCs) are circular regions of faint radio radiation with bright edges that are not visible to optical, infrared, ultraviolet, and X-ray wavelengths.
Some ORCs contain galaxies at their centers, while others do not, but what sets them apart is their size, which is significantly larger than normal galaxies. Some ORCs display a double ring structure, while others have a single ring. There are also some with internal arc-like structures that might be linked to galaxies surrounded by bubbles of radio emission.
While objects with high spherical symmetry are common in the universe, ORCs appear to be distinct from them all, prompting astronomers to classify them as a new type of object.
ORCs could potentially be a type of spherical shock wave generated by fast radio bursts, gamma-ray bursts, or neutron star mergers. If this is the case, they must be extremely ancient to have grown to such a large size.
Alternatively, they may be associated with material jets emanating from the central regions of radio galaxies, but explaining their size and the absence of central objects in all galaxies is challenging.
One intriguing theory suggests that ORCs are created by the fusion of two supermassive black holes in a central galaxy. The available data also support the idea that the shell is caused by a “shock termination” of high-energy particle winds from the central “starburst” galaxy.
Another hypothesis proposes that the ORC is the throat of a “wormhole,” a theoretical passage through spacetime. However, astronomers have yet to agree on the true nature of ORC.
This article addresses the question (by Bradford’s Brendan Owens): “What are strange radio circles?”
If you have any questions, please email us at:questions@sciencefocus.comor send us a messageFacebook,XorInstagramPage (remember to include your name and location).
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Have you ever felt like you’re stuck in a hole? Newsflash: Yes, you are. Astronomers call it a “local hole,” but that’s quite an understatement. It’s vast, it’s gigantic, it’s gigantic – but the truth is, adjectives are inapplicable when it comes to this expanse of nothingness. It is the largest cosmic cavity known to us, spanning 2 billion light years. Our galaxy happens to be near its center, but the problem with this hole is not that it poses any immediate danger, but rather that it shouldn’t exist.
The question is whether one of our most firmly held beliefs about the universe is true. This assumption, known as the cosmological principle, states that matter in the universe should be uniformly distributed on the largest scale. It is the foundation upon which much of modern cosmology is built. If the void were real, the stone might have collapsed.
Because of this, few people dared to believe that the void could be real. But as evidence has grown in recent years, astronomers have moved from suspicion to reluctant acceptance. They discovered other similarly huge structures. So now the question is being asked with increasing urgency: If we are indeed living in a vacuum, do we need to significantly revise our cosmological model? That may include rethinking the nature of gravity, dark matter, or both.
The idea that the universe has the same properties from beginning to end can be traced back at least to Isaac Newton. He claimed that the motion of stars and planets could be explained…
A total solar eclipse is a great opportunity to learn about the sun
ESA/Royal Observatory of Belgium
A total solar eclipse occurs somewhere on Earth approximately every 18 months, and that has been the case throughout human history. Not surprisingly, people have been studying these dramatic events for just as long, with the first records of solar eclipses dating back more than 3,000 years. During that time, we learned an amazing amount about the Sun, Earth, and even the basic laws of physics from total solar eclipses.
For most of history, humans could only see the faint outermost layers of the sun during total days (periods when the moon covers the entire sun’s disc). This faint blanket of plasma, called the corona, has been central to the scientific advances resulting from the study of solar eclipses.
Solar eclipse in 2024
On April 8th, a total solar eclipse will pass over Mexico, the United States, and Canada. Our special series covers everything you need to know, from how and when to see a solar eclipse to the strangest solar eclipse experience of all time.
The corona is home to many of the sun’s most fascinating phenomena, including coronal mass ejections (CMEs), which occur when the sun’s swirling magnetic fields blast bundles or clumps of matter into space. If a CME were to hit Earth, it could damage satellites and power grids, and could be extremely dangerous to astronauts in space, beyond the protection of Earth’s atmosphere.
“The Sun’s magnetic activity changes over time and changes across the star’s surface.” meredith mcgregor at Johns Hopkins University in Maryland. Currently, there is no good way to predict this activity. But by studying the coronavirus, we may be able to start doing just that.
A total solar eclipse isn’t the only way to see the outermost layer of the sun. There is also a device called a coronagraph, which uses a shade to block the sun’s disk in a type of artificial solar eclipse. These instruments are used not only to study our own star, but also to study other stars that are more distant and look for planets around them that would otherwise be hidden in the glare of starlight. It is also important. “The idea of using coronagraphs to block out the light of other stars and look for extrasolar planets comes from natural solar eclipses,” MacGregor says.
The same dimness that makes the corona difficult to observe in totality also makes it an excellent target for spectroscopy. Spectroscopy works by splitting light into its constituent wavelengths. This allows researchers to determine which elements are present in a material by the unique pattern of wavelengths each element emits or absorbs. Helium was discovered using spectroscopy during a solar eclipse in 1868. This was the first time an element had been discovered by studying the sky.
Shortly thereafter, astronomers discovered what appeared to be another new element in the corona, which they named corona, but it turned out that it was simply iron heated to extraordinary temperatures of several million degrees. found. Even though it was not a new element, it was a puzzling discovery. The surface of the sun is only about 5,600 degrees Celsius, so why is the outermost layer so hot?
I said, “Imagine you’re at a campfire and you start walking away from the campfire. It’s supposed to be cold, but it’s much hotter.” Frederick Bartley at the Ohio State Science and Industry Center. “That’s what’s happening with coronavirus, but no one knows why.”
The eclipse also provided some of the first proofs of Albert Einstein’s theory of general relativity, which governs the behavior of large-scale gravity. One of the key predictions of general relativity is that massive objects should bend the trajectory of light as they pass by. Einstein first published the theory in his 1915, and evidence of its truth came in his 1919 when astronomer Arthur Eddington observed starlight bending around the sun during a solar eclipse.
As a total solar eclipse passes over Central and North America this month, astronomers will continue a long-standing tradition of using the totality to observe the sun and precisely how it affects the space around it. It turns out. The sun still has many secrets to unravel, and eclipses are one of the best times to study them.
Professor Rajendra Gupta of the University of Ottawa is challenging current theoretical models of the composition of the universe by showing that there is actually no room for dark matter in the universe.
This artist's impression shows the evolution of the universe, starting with the Big Bang on the left and continuing with the emergence of the Cosmic Microwave Background. The formation of the first stars ends the Dark Ages of the universe, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.
In cosmology, the term dark matter refers to anything that does not appear to interact with light or electromagnetic fields, or that can only be explained by gravity.
Although we can't see it and don't know what it's made of, it helps us understand how galaxies, planets, and stars work.
Professor Gupta reached this conclusion using a combination of covariation coupling constant (CCC) and “tired light” (TL) theory (CCC+TL model).
His model combines two ideas: how the forces of nature diminish over cosmic time and that light loses energy as it travels long distances.
It has been tested and shown to be consistent with several observations, including how galaxies spread and how light from the early universe evolved.
The discovery challenges the common understanding of the universe, which suggests that about 27% of the universe is made up of dark matter, less than 5% is normal matter, and the rest is dark energy.
“This new discovery confirms previous research, which found that the universe is 26.7 billion years old, and found that the existence of dark matter is not necessary for the universe,” said Gupta. the professor said.
“Standard cosmology says that the accelerating expansion of the universe is caused by dark energy, but it's actually because the forces of nature weaken as the universe expands, not by dark energy.”
In his research, Professor Gupta analyzed data from a recent paper on the distribution of galaxies at low redshifts and the angular size of the sound horizon in the literature at high redshifts.
“There are several papers that question the existence of dark matter, but to my knowledge, my paper does not support the existence of dark matter, while being consistent with the major cosmological observations that we have had time to confirm.” “This is the first paper to exclude ,” he said.
“By challenging the need for dark matter in the universe and providing evidence for a new cosmological model, this study opens up new avenues for exploring the fundamental properties of the universe.”
of new mapThis quasar, called Quaia, contains about 1,295,502 quasars from across the visible universe and could help astronomers better understand the properties of dark matter.
story fisher other. This is an all-sky quasar catalog that samples the largest comoving volume of any existing spectroscopic quasar sample.Image credit: Story Fisher other., doi: 10.3847/1538-4357/ad1328.
Quasars are powered by supermassive black holes at the centers of galaxies and can be hundreds of times brighter than entire galaxies.
When the black hole's gravity kicks up nearby gas, the process creates a very bright disk, and sometimes a jet of light, that can be observed with telescopes.
The galaxies that quasars live in are hidden in huge clouds of invisible dark matter.
The distribution of dark matter gives insight into how much dark matter is present in the universe and how strongly clustered it is.
Astronomers compare these measurements across cosmic time to test current models about the composition and evolution of the universe.
Quasars are so bright that astronomers use them to map dark matter in the distant universe and fill in a timeline of how the universe evolved.
For example, scientists are already comparing the new quasar map to the Cosmic Microwave Background, the oldest snapshot of light in the universe.
As this light travels to us, it is bent by an intervening web of dark matter (the same web drawn by quasars), and by comparing the two, scientists can determine how matter changes over time. You can measure how strongly it clumps together.
“The new quasar catalog differs from all previous catalogs in that it provides the largest volumetric three-dimensional map in the history of the universe,” said David, an astronomer at the Center for Computational Astrophysics at the Flatiron Institute in New York.・Professor Hogg said. University.
“This is not the catalog with the most quasars or the highest quality quasar measurements, but it is the catalog with the largest total volume of the universe mapped.”
Professor Hogg and his colleagues constructed the Quasar map using data from the third data release of ESA's Gaia mission, which includes 6.6 million quasar candidates, as well as data from NASA's Wide-field Infrared Explorer and Sloan Digital Sky Survey. did.
By combining the datasets, contaminants such as stars and galaxies were removed from Gaia's original dataset and the distance to the quasar was determined more precisely.
“We were able to measure how matter clustered in the early universe with as much precision as those from major international research projects. Data as a 'bonus' from the Milky Way This is quite remarkable considering that we got . We are focusing on the Gaia project,” said Dr. Kate Storey-Fisher, a postdoctoral researcher at the International Physics Center Donostia.
“It's very exciting to see this catalog spurring so much new science.”
“Researchers around the world use quasar maps to measure everything from variations in the initial density that seeds the cosmic web, to the distribution of voids in the universe, to the movement of our solar system through space. ”
Astronomers have created a map showing where dust, stars, and other nuisances are expected to obstruct the view of certain quasars. This is important in interpreting quasar maps.
“This catalog of quasars is a great example of how productive astronomy projects can be,” Professor Hogg said.
“Gaia was designed to measure stars in our galaxy, but it also discovered millions of quasars, giving us a map of the entire universe.”
In 1998, Stephen Hawking accepted me as a doctoral student to “work on the quantum theory of the Big Bang.” This PhD project turned into a close collaboration that lasted almost 20 years, ending with his passing on March 14, 2018, five years ago. .
Our research focused on the mystery of how the Big Bang created conditions conducive to life. The intention behind this mysterious occurrence puzzled us.
These questions pushed the boundaries of physics, a realm Hawking enjoyed exploring. He was motivated by the possibility of unraveling the mysteries surrounding the universe’s design.
Our joint scientific endeavors brought us closer as collaborators. His determination and optimism towards solving cosmic mysteries were inspiring and influential.
He made us feel like we were crafting our own creation narrative, a shared journey we embarked on.
The concept of time initiating with the Big Bang was initially proposed by Georges Lemaître, which Einstein initially dismissed. Eventually, Hawking and Roger Penrose validated Lemaître’s theory.
The inception of time has remained a fundamental aspect of Big Bang cosmology, posing questions about its existence.
Hawking’s final theory on the Big Bang proposes a unique and bold perspective: the universe as a holographic projection.
His visualization of this idea involved a disc-shaped image, resembling the one depicted above. The holographic past cannot extend beyond the Big Bang.
Our theory points to the Big Bang as the origin of time, shedding light on the universe’s design mystery from a different angle.
Dr. Thomas Hertog, a Belgian cosmologist at the University of Leuven, is the author of the upcoming book “About ‘The Origin of Time’: Stephen Hawking’s final episode theory,” releasing on April 4, 2023. You can pre-order it at Penguin and Amazon UK.
Things happen at a glacial pace in Antarctica. Just ask Peter Gorham. For a month at a time, he and his colleagues float a giant balloon loaded with a collection of antennas above the ice, traversing more than a million square kilometers of frozen terrain in search of evidence of high-energy particles arriving from space. I watched it scan.
When the experimental aircraft returned to the ground after its first flight, it showed nothing of itself, except for the odd flash of ambient noise. The same situation occurred after the second flight over a year later.
During the balloon's third flight, the researchers decided to revisit past data, especially signals that had been ignored as noise. It was lucky that they did. Upon closer inspection, one signal appeared to be a signature of a high-energy particle. But that wasn't what they were looking for. Plus, it seemed impossible. These particles did not fall from above, but were ejected from the ground in an explosive manner.
This strange discovery was made in 2016. Since then, all kinds of proposals rooted in known physics have been put forward to explain this complex signal, but all have been ruled out. What is left behind is shocking in its implications. To explain this signal, we need the existence of a dizzying universe that was created in the same Big Bang as ours and exists in parallel. In this mirror world, plus is minus, left is right, and time goes backwards. This is probably the most heart-melting idea ever to come out of Antarctic ice, and it just might be true.
They call it “the irrational validity of mathematics.” Physicist Eugene Wigner has the fascinating ability to describe and predict all kinds of natural phenomena, from the movements of planets and the strange behavior of fundamental particles to the effects of the universe, simply by manipulating numbers. He coined the term in the 1960s to summarize the facts. A collision between two black holes billions of light years away. Some are now wondering whether mathematics succeeds where all else fails, figuring out what it is that allows us to ponder the laws of nature in the first place.
That’s a big question. The question of how matter creates felt experiences is one of the most vexing problems we know of. And sure enough, the first fleshed-out mathematical model of consciousness sparked a huge debate about whether it could tell us anything meaningful. But as mathematicians strive to hone and expand the tools for looking deep within themselves, they are faced with some surprising conclusions.
In particular, they make clear that if we are to achieve an accurate account of consciousness, we must abandon our intuitions and realize that all kinds of inanimate objects, perhaps the entire universe, can be conscious. It seems to suggest that we may need to accept it. “This could be the beginning of a scientific revolution,” he says. Johannes KleinerMathematician at the Munich Center for Mathematics and Philosophy in Germany.
If so, it’s been going on for a long time. Philosophers have wondered about the nature of consciousness for thousands of years, but to little avail. Then half a century ago, biologists got involved. they discovered…
Article amended on May 4, 2020Fix: The campus of the Norwegian Inland University of Applied Sciences, where Hedda Hassel-Morch is based, has been updated to change the attribution of research on the effects of sleep or sedation on Phi.
Reionization of the universe happened about 500 million to 900 million years after the Big Bang. This represents the transformation of neutral hydrogen into an ionized gas and marks the end of the “Dark Ages” in the history of the universe. Currently, astronomers using the NASA/ESA/CSA James Webb Space Telescope have obtained spectra of eight ultrafaint dwarf galaxies that existed less than a billion years after the Big Bang. Their observations could help settle long-standing scientific debates about the driving force of reionization and could also be essential to understanding the formation of the first galaxies.
Astronomers estimate that 50,000 near-infrared sources are represented in the Webb image of galaxy cluster Abel 2744. Image credits: NASA / ESA / CSA / I. Labbe, Swinburne Institute of Technology / R. Bezanson, University of Pittsburgh / A. Pagan, STScI.
There is still much we don’t understand about the period in the early history of the universe known as the Era of Reionization.
It was a time of darkness, without stars or galaxies, and filled with a thick fog of hydrogen gas, until the first stars ionized the surrounding gas and light began to pass through.
Astronomers have spent decades trying to identify sources that emit radiation powerful enough to gradually remove this hydrogen fog that blanketed the early universe.
“Our discovery reveals the important role played by ultrafaint galaxies in the evolution of the early universe,” said astronomer Dr. Irina Chemelinska from the Paris Institute of Astrophysics.
“They produce ionizing photons that convert neutral hydrogen into ionized plasma during the reionization of the universe.”
“This highlights the importance of understanding low-mass galaxies in shaping the history of the universe.”
“These cosmic power plants collectively emit more than enough energy to accomplish their work,” said Dr. Hakim Atek, also of the Paris Institute of Astrophysics.
“Despite their small size, these low-mass galaxies produce large amounts of energetic radiation, and their abundance during this period is so great that their collective impact alters the state of the entire universe can do.”
In the study, astronomers captured and analyzed the spectra of eight very faint galaxies magnified by the lensing star cluster Abel 2744.
They found that these galaxies emit large amounts of ultraviolet light, at levels four times higher than previously thought.
This means that most of the photons that reionized the Universe likely came from these dwarf galaxies.
“With the web, we have stepped into uncharted territory,” said Dr. Themiya Nanayakkara, an astronomer at Swinburne University of Technology.
“Our study reveals more provocative questions that must be answered in efforts to chart the evolutionary history of our beginnings.”
of result It was published in the magazine Nature.
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H. Atek other. 2024. Most of the photons that reionized the universe came from dwarf galaxies. Nature 626, 975-978; doi: 10.1038/s41586-024-07043-6
Being optimistic, believing in your abilities, practicing affirmations, being grateful, and setting clear goals can bring real benefits. But is manifestation pure pseudoscience, or does it mean something? We look at how the WOOP approach can actively support you on your journey towards realizing your dreams. I’ll go.
volcanic eruption
After three years of violent eruptions, experts now believe that Iceland’s Reykjanes Peninsula has entered a new phase of volcanic activity.
counterintuitive universe
The world is not what it seems. This special feature explores how science has exposed fallacies and false beliefs about heaven and earth throughout history.
planet nine
Something strange is happening beyond Neptune, and it may change everything we think we know about our solar system. Could orbital oddities reveal the existence of undiscovered planets near our heavens? Or is it something else?
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Pothole: There are 750,000 potholes in Britain’s roads, creating a crater-like structure. These can cause serious damage to vehicles and pose a danger to drivers, cyclists, and pedestrians. But with bacteria and self-healing asphalt, it could be smooth again.
First moon base: Head to the moon’s south pole to peer inside what may be the first human habitation on the moon. Initially he planned to house 144 people, but the modular design of the Lunar Habitat Master Plan will expand and evolve with the inhabitants.
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Crescent Nebula: More complex than the human brain?
Reinhold Wittich/Stocktrek Images/Alamy
Back in 2012, neuroscientist Christoph Koch wrote in his book: Consciousness: Confessions of a Romantic Reductionist The human brain is “the most complex object in the known universe.” This seems intuitive, given that the brain has approximately 86 billion neurons, which are connected in ways that are still beginning to be understood. But when I put it, David Wolpert At New Mexico's Santa Fe Institute, founded in the 1980s as a hub for the budding field of complexity science, he doesn't think so. “It's almost a travesty that we are the most complex system in the universe,” he says. “That question is actually misguided.”
Nevertheless, I persevere. Is there a common measure of complexity that can be applied to complex systems of all kinds? After all, if you squint, galaxy clusters and the filaments that connect them look like intertwined circuits of neurons. Masu. The human brain even has almost as many neurons as there are galaxies in the observable universe. This formal similarity may have something to do with the general laws by which complexity emerges, he says. Ricard Sole At Pompeu Fabra University in Barcelona, Spain. Or maybe not. “By chance, it might show up in both systems, but that doesn't mean anything,” he says.
Moreover, complexity is not defined by components and their interconnections. It's the idea that the whole is more than just something.
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