A mysterious object the size of Manhattan is blazing through our solar system, and its origins remain a puzzle to the world's ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) ...

Such is the case with 3I/ATLAS, a third known interstellar object from outside of our solar system to be discovered, which ...

A strange interstellar object is hurdling its way towards our pale blue dot — and according to Harvard's top UFO hunter, ...

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 ...

Astronomers are scrambling to gather data on a mysterious object that’s currently hurtling through the solar system. Preliminary observations suggest it came from interstellar space, and if confirmed, ...