A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar ...

A newly discovered ice comet from deep space may be over 7 billion years old, making it the most ancient comet scientists ...

The astronomical community is abuzz over a newly discovered "interstellar object," only the third of its kind ever seen, ...

Astronomers tracking an interstellar object flying through the solar system think it comes from a star at least 8 billion ...

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

Scientists now say an interstellar comet discovered earlier this month could be one of the oldest that astronomers have ever ...

After defending his PhD thesis on modeling interstellar objects on Monday, June 30, Matthew Hopkins intended to take some ...

However, new research has shown this potentially "water ice-rich" visitor could be even more extraordinary than initially ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

A rare interstellar comet is flying through our solar system. Here's how—and when—you might be able to see Comet ATLAS from ...

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it ...

The first interstellar object spotted in our Solar System was the cigar-shaped ‘Oumuamua, discovered in 2017 by the ...