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AAS #237: five things we learned

AAS #237: five things we learned
Here are the key take-outs from the 237th meeting of the American Astronomical Society.
The Hubble Space Telescope captured this image of the butterfly wing - shaped nebula, NGC 2346. The nebula is about 2,000 light-years away from Earth in the direction of the constellation Monoceros. Credit: NASA/STScI
Each January, the American Astronomical Society (AAS) conducts a meeting widely hailed as the “Superbowl of astronomy”, in which astronomers gather from around the world to share their latest results.
Last year it was in Honolulu. But this year, thanks to COVID-19, it was online something that AAS had already practised for smaller meetings as far back as June 2020. Not surprisingly, given the rehearsal, they did a smash-bang job of it. But they also had a remarkable amount to present… plus a lot of fun. ....

United States , Northwestern University , Milky Way , Magallanesy Antaica Chilena , California Institute Of Technology , Jeffrey Andrews , Kat Barger , Mt Palomar , Oliver Roberts , Kevin Hurley , Xinlun Cheng , David Ciardi , University Of California , Panoramic Survey Telescope , European Space Agency Gaia , Decals Dark Energy Camera Legacy , Texas Christian University , Universities Space Research Institute , Canadian Hydrogen Intensity Mapping Experiment , University Of Virginia , American Astronomical Society , Exoplanet Survey Satellite , Each January , Butterfly Nebula , Lowell Observatory , Kitt Peak ,

Astronomers Witness an Ancient Galaxy Dying Out | Mysterious Universe

Incredibly, astronomers have witnessed an ancient and distant galaxy dying out. Galaxies die when their stars stop forming and by using the Atacama Large Millimeter/submillimeter Array of telescopes in Chile, scientists observed the galaxy called ID2299 emit nearly half of the gas that is used to form the stars.
What is so astonishing about this is that the light from ID2299 takes approximately 9 billion years to reach us, so what the astronomers are witnessing is how that galaxy looked when the universe was just 4.5 billion years old (it is currently around 14 billion years old).
The amount of gas that the ID2299 galaxy loses each year is equivalent to about 10,000 suns and so far it has lost approximately 46% of its total amount of cold gas. While it has lost nearly half of its cold gas, stars are still forming within it at an incredibly fast rate (hundreds of times faster than the rate that stars form in our Milky Way Galaxy). At the rate that the ID2299 galaxy is using ....

France General , Milky Way , Magallanesy Antaica Chilena , United Kingdom , Annagrazia Puglisi , Emanuele Daddi , Durham University , Saclay Nuclear Research Centre , Atacama Large , Milky Way Galaxy , Nature Astronomy , Atacama Large Millimeter Submillimeter Array , Early Universe , Space Amp Astronomy , பிரான்ஸ் ஜநரல் , பால் வழி , ஒன்றுபட்டது கிஂக்டம் , டர்ஹாம் பல்கலைக்கழகம் , பால் வழி விண்மீன் , இயற்கை வானியல் , ஆரம்ப பிரபஞ்சம் , இடம் ஆம்ப் வானியல் ,