Far beyond the bright planets, in the dim outskirts of the Solar System, astronomers keep stumbling on objects that refuse to ...

Far from the planets and familiar constellations, an interstellar visitor is pulsing with a rhythm that looks uncannily like ...

Object 3I/ATLAS is now too far from Earth to aim a telescope at, but prior observations showed some unusual behavior. The anomalous nature of the object led astrophysicist Avi Loeb to apply a thought ...

Astronomers found signs that mysterious interstellar object 3I/ATLAS is radiating a "heartbeat" pulse of light that repeats ...

Interstellar comet 3I/ATLAS shows odd traits—anti-tail, strange acceleration, unusual chemistry—prompting scientists to warn ...

Astronomers have spotted an intriguing cluster of objects in the Kuiper belt, an enormous, donut-shaped region of icy objects beyond Neptune.

A new strange observation is shaking up theories about 3I/ATLAS, the mysterious Manhattan-sized interstellar object that has been blazing through our solar system. The object, which has ...

As excitement builds across the astronomy community, experts say the mysterious interstellar comet 31/ATLAS will pass Closest ...

Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

Earlier this week, NASA officials released long-delayed images of interstellar visitor 3I/ATLAS. One of the shots, taken by ...

Far beyond Neptune, at the far outer rim of our Solar System, astronomers have spotted what looks like a hidden “structure” ...