Comet 3I/ATLAS has arrived as the third confirmed visitor from interstellar space, and it is not behaving the way a quiet chunk of ice and rock is supposed to. As astronomers track its path through ...

A mysterious interstellar comet older than the Sun is exposing alien chemistry and rewriting astronomy as we know it.

New observations of the interstellar comet 3I/ATLAS include the first measurement of the abundance of deuterated water ...

University of Michigan astronomers have found that the interstellar comet 3I/ATLAS contains 30 times more "heavy water" ...

The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came ...

Scientists observe interstellar comet 3I/ATLAS releasing massive water vapor near the Sun, revealing clues about material ...

Today is the day that astronomers, amateur stargazers and alien conspiracy theorists alike have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as it will ever get. But lest you ...

Add Yahoo as a preferred source to see more of our stories on Google. Pictures of 3I/ATLAS will soon be all we have to remind us of the strange interstellar comet and its brief visit to our cosmic ...

A new study of the interstellar comet 3I/ATLAS led by the University of Michigan shows that its water has a remarkably high ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. New images captured by the European Space Agency (ESA) of the interstellar comet 3I/ATLAS has "surprised" the agency's ...