More than tenfold: That is the reported deuterium difference between water in interstellar comet 3I/ATLAS and water measured ...

Gas leaving the interstellar comet 3I/ATLAS moves at roughly half the speed of gas coming off Solar System comets at the same ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

Comet 3I/ATLAS is continuing to surprise astronomers. New observations from the Atacama Large Millimeter/submillimeter Array (ALMA), of which the U.S ...

Interstellar comet 3I/ATLAS is seen in this composite image captured on Nov. 6 by the Europa Ultraviolet Spectrograph instrument on NASA’s Europa Clipper spacecraft, from a distance of around 102 ...

The interstellar object, 3I/ATLAS, was first discovered in July 2025, and made its closest approach to the sun (perihelion) in late October. New observations of 3I/ATLAS were taken in December from ...

It turns out interstellar comet 3I/ATLAS was almost called 3I/Rubin, after researchers found that the giant survey telescope coincidentally spotted this visitor from the stars over a week before it ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Learn how ALMA observations revealed unusually high levels of methanol in interstellar comet 3I/ATLAS and what the molecule’s chemistry may reveal about how icy bodies form around other stars. Comet ...

Credit: Gianluca Masi, Virtual Telescope Project. Background image: Image: NASA, ESA, CSA, STScI; Image Processing: Alyssa Pagan (STScI). Created by Anthony Wood in Canva. Tune in tonight(Jan. 22) to ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London. Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and ...