Discover stunning new images captured by NASA/ESA/CSA’s James Webb Space Telescope featuring the barred spiral galaxy Messier 77, showcasing its mesmerizing swirl of dust, vibrant newborn stars, and an extraordinarily active nucleus.
This breathtaking image of Messier 77, taken by Webb’s Mid-Infrared Observatory (MIRI), illustrates its unique spiral arms, dust within its disk, and an exceptionally bright core. The orange lines radiating from the galaxy’s center are diffraction spikes, an optical phenomenon from Webb’s design. Image credit: NASA / ESA / CSA / Webb / A. LeRoy.
Situated about 62 million light-years from Earth in the constellation Cetus, Messier 77 ranks among the brightest and most extensively studied galaxies visible from Earth.
This galaxy, commonly referred to as the Squid Galaxy, NGC 1068, LEDA 10266, and Cetus A, boasts an apparent magnitude of 9.6.
First discovered in 1780 by French astronomer Pierre Méchain, Messier 77 was initially recorded as a nebula before its true galactic nature was revealed.
As technology advanced, astronomers like Charles Messier recognized the galaxy’s immense scale and complexity.
Measuring approximately 100,000 light-years in diameter, Messier 77 is one of the largest entries in the Messier catalog, with a gravitational influence strong enough to distort its neighboring galaxies. Additionally, it is one of the nearest galaxies exhibiting an active galactic nucleus (AGN).
Messier 77 is classified as a Type II Seyfert galaxy and is particularly luminous in infrared wavelengths.
According to Webb astronomers, “At the heart of Messier 77 lies a compact region filled with hot gas that shines brighter than the entire galaxy, surpassing even the capacity of Webb’s camera.”
“Powered by a supermassive black hole weighing 8 million solar masses, this AGN pulls gas into rapid orbits, causing collisions that generate immense radiation.”
This striking image of Messier 77, captured by Webb’s Near Infrared Camera (NIRCam), brilliantly showcases its features. Image credit: NASA / ESA / CSA / Webb / A. LeRoy.
“Messier 77 is not only recognized for its visible AGN but also as a vigorous star-forming galaxy,” they added.
“Near-infrared observations reveal a widening bar in the central region, untraceable in visible-light images of the galaxy.”
“This bar is encircled by a bright ring known as the starburst ring, formed by the inner sections of Messier 77’s two spiral arms.”
“Starburst zones in galaxies typically exhibit remarkably high star formation rates.”
“This ring, exceeding 6,000 light-years in diameter, displays intense starburst activity characterized by dense orange bubbles surrounding the ring.”
“Given Messier 77’s relatively close proximity to Earth, this starburst ring serves as an exemplary case study in galactic phenomena.”
“As an active spiral galaxy, Messier 77’s disk is abundant in gas and dust, both of which are vital for future star formation.”
“Webb’s MIRI highlights the galaxy’s view filled with the glow of interstellar dust particles, depicted here in blue.”
“These particles form massive vortexes of swirling filaments resembling smoke, with cavities interspersed.”
“Glowing orange bubbles, crafted by newly formed star clusters, can also be seen along the galaxy’s arms.”
“Beyond Webb’s focused field of view, Messier 77’s arms integrate into a faint hydrogen gas ring, thousands of light-years wide, where additional star formation is underway.”
“Delicate filaments of hydrogen gas stretch across this ring into intergalactic space, forming the outermost layer surrounding the galaxy.”
“These tentacle-like filaments contribute to the moniker Squid Galaxy for Messier 77.”
Source: www.sci.news
