The small, icy visitor now racing away from the inner solar system is not just another comet. It is an interstellar object, ...

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what you’ll need to catch a glimpse.

No one knows where the comet came from. It’s like glimpsing a rifle bullet for a thousandth of a second. You can’t project ...

COLUMBUS, Ohio — In a cosmic first for this decade, astronomers have identified a mysterious comet from another galaxy — marking only the third time in history that an interstellar object has entered ...

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 ...

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 ...

The latest images of an interstellar comet shared by NASA have captured how an array of spacecraft witnessed a flyby that was truly out of this world, revealing clues to the object’s composition.