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

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

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

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

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

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

The solar system has an uninvited guest that is currently shooting toward us on a one-way trip through our cosmic ...

Captured just days after its discovery, the images offer the clearest view yet of this rare visitor from beyond our solar system.

Dubbed 3I/ATLAS, it is blazing through our cosmic cul-de-sac at truly awe-inspiring speeds between the main asteroid belt and ...

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.

Astronomers have discovered yet another alien visitor to the Solar System.

For only the third time in recorded history, an interstellar object has crossed into our solar system, creating quite the ...