Tag Archives: cosmic

Unraveling the Enigmatic Giant Examoon: Exploring the Cosmic Mysteries of Pandora’s Box

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This artist’s impression shows a gas giant exoplanet orbiting a Sun-like star, represented by Kepler-1625b. Credit: NASA

The discovery of giant exomoons around the planets Kepler-1625b and Kepler-1708b raises questions. Since the planets orbit, it is not uncommon for these exoplanets to have moons around them. This makes them even more difficult to detect. So far, only two of the more than 5,300 known exoplanets have been discovered to have moons. New data analysis shows that scientific statements are rarely black and white, that behind every result there is more or less uncertainty, and that the path to a statement often resembles a thriller. Masu.

Introduction to Exomoon research

In observations of the planets Kepler-1625b and Kepler-1708b with the Kepler and Hubble Space Telescopes, researchers discovered the first traces of such moons. New research calls these previous claims into question. Scientists from the Max Planck Institute for Solar System Research and Sonnenberg Observatory in Germany report in the same journal. natural astronomy

The “planet-only” interpretation of the observations is more definitive.

For their analysis, the researchers used Pandora, a newly developed computer algorithm that facilitates and accelerates the search for the Exum Moon. They also investigated what types of exomoons could in principle be discovered with modern space-based astronomical observations. Their answers are quite shocking.

Examoon: A rare entity in observation

In our solar system, with the exception of Mercury and Mercury, the fact that a planet orbits one or more moons is more the rule than the exception. Venus, all other planets have such companions.

For gas giants Saturn Researchers have discovered 140 natural satellites to date. Therefore, scientists believe that planets in distant star systems are also likely to have moons. But so far, there is only evidence for two such examooons: Kepler-1625b and Kepler-1708b. This low yield is not surprising. After all, distant satellites are naturally much smaller than their home world, and therefore much more difficult to find. And combing through observations of thousands of exoplanets for evidence of satellites is extremely time-consuming.

Pandora: Exomoon search algorithm

To make searching easier and faster, the authors of the new study utilize a search algorithm called Pandora that they developed and optimized for exomoon searches. They announced the method last year And the algorithm is available to all researchers as open source code. When applied to observational data from Kepler-1625b and Kepler-1708b, the results were surprising.

“We wanted to confirm the discovery of exomoons around Kepler-1625b and Kepler-1708b,” said MPS scientist Dr. Rene Heller, lead author of the new study. “However, unfortunately, our analysis shows that this is not the case,” he added.


Source: scitechdaily.com

Exploring the Cosmic Landscape: Nueva Vizcaya, Philippines

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This Copernicus Sentinel 2 image shows the Nueva Vizcaya province in the Philippines, highlighting its agricultural landscape and urban areas through a false color composite. The image depicts different seasons in different colors, revealing intricate details about crop growth stages, flooded rice fields, and urbanization. Credit: Contains corrected Copernicus Sentinel data (2022-23) processed by ESA. CC BY-SA 3.0 IGO

This pseudocolor satellite image from Copernicus Sentinel 2 brightens the center of Nueva Vizcaya province on Luzon, the Philippines’ largest and most populous island.

The image’s color is due to it being a multitemporal composite consisting of three Copernicus Sentinel 2 images acquired in the mission’s near-infrared channel over a 10-month period. Each acquisition is assigned a different color. Red is the acquisition in May 2022 during the hot dry season, green is the acquisition in September 2022 during the rainy season, and blue is the acquisition in March 2023 during the cool dry season.

This combination highlights different characteristics such as crop type and changes that occur between acquisitions indicating different growth stages.

A patchwork of brightly colored farmland stands out from the center of the image to the bottom left. Areas of red and green shades mean that plant growth took place in May and September, respectively. The fields visible in shades of blue, which make up most of the image, indicate that plant growth occurred mainly in March, during the cool dry season.

Perhaps due to intensive rice production, there are irrigation canals between the fields, and most fields remain flooded all year round. A bright white area, such as the one in the middle of a field, indicates a zone covered with dense vegetation.

Straight lines and gray areas represent roads and urban areas. These include Nueva Vizcaya’s largest town, Solano, visible in the lower left surrounded by blue fields, and Bayombong, the provincial capital further south.

The dark curving lines represent rivers, the largest of which is the Magat River, flowing northeast through the image. If you look closely, you can see different colors along the river’s flow. This is probably due to changes in water levels and river channels at different times of the year.

Copernicus Sentinel 2 has 13 spectral channels and is designed to provide data that can be used to map and monitor agricultural land, as the mission frequently revisits the same areas and has high spatial resolution. , changes in inland waters can be closely monitored.

In January 2023, ESA and the European Commission signed an agreement to build the first Copernicus mirror site in Southeast Asia in the Philippines. This new initiative will strengthen the Philippines’ response capacity and resilience to natural and man-made disasters through the strategic use of space data.


Source: scitechdaily.com