New evidence suggests that the famous interstellar traveler may be so old that its home system no longer exists.

No, it's not a Barbie-themed moon.

In the vast expanse of the cosmos, where time stretches across unimaginable scales, some objects stand out as cosmic time ...

Interstellar comet 3I/ATLAS has steadily been making its exit ever since it had a rendezvous at the end of October with the sun.

A flying piece of cosmic rock or an alien threat? Comet 3I/ATLAS is hurtling through our solar system and captivating scientists and internet users alike, even prompting Kim Kardashian to ask NASA for ...

CAPE CANAVERAL, Fla. (AP) — A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space. Discovered over the summer, the comet known as ...

The interstellar comet 3I/ATLAS is leaving our solar system. See new photos from a European Space Agency orbiter on its way to Jupiter.

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Between April 13-23, there are no fewer than six planetary conjunctions (alignments) to take in. Mercury is at its best for ...

Catching a comet in the process of falling apart is difficult, but a coincidence let astronomers see one in more detail than ...