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 ...

Astronomers have a problem. The comets in our solar system formed some 4.5 billion years ago in its frigid outer regions, beyond the current orbit of Jupiter. These "dirty snowballs" naturally contain ...

It has now been just over a year since the comet 3I/ATLAS first captured the world's attention as the third known object to fly through our solar system from beyond. Astronomers are still learning new ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Astronomers using the Atacama Large Millimeter/submillimeter Array ...

Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned out to be a comet, 3I/Atlas, and it provoked interest from astronomers and ...