An object from another system is currently passing through our Solar System, and its behavior is of great interest to ...

Scientists combine observations from Mars missions to get the clearest and most accurate track of 3I/Atlas so far.

A 23-day countdown to December 19 will test every prevailing theory about what lies beyond our solar system. The speculation ...

The interstellar object 3I/ATLAS is drawing renewed scrutiny from astronomers after a striking new photograph captured in ...

When a faint green smudge appeared in images from a backyard telescope in Aguadilla, Puerto Rico, on Nov. 22, 2025, astronomers did not expect it to upend basic assumptions about how comets work. Yet ...

It was soon deduced that this is an interstellar comet, meaning it has come from another solar system. It’s only the third ...

According to the team, the object likely came from the direction of Sagittarius, and will depart our Solar System towards ...

NASA will host a live event at 3 p.m., Wednesday, November 19, to share imagery of the interstellar comet 3I/ATLAS.

Boeing's Starliner spacecraft will only fly cargo to the International Space Station after NASA changed the contract with ...

New telescope observations reveal structural features never documented in any known celestial object The morphology defies conventional understanding. The forward anti-tail persists where physics says ...

Discover NASA's latest images of the extraordinary interstellar comet 3I/ATLAS, the third comet from another star entering ...

NASA released new images of 3I/ATLAS, the third comet ever to be discovered in Earth's cosmic neighborhood originating from ...