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 ...

The official UN/IAWN document confirms the interstellar comet 3I/ATLAS is the target of a formal planetary-defence exercise.

A new pre-print paper suggests that our latest interstellar visitor, comet 3I/ATLAS, may be headed for one final close ...

The interstellar comet 3I/ATLAS challenges physics with a missing dust tail, a forward anti-tail, and strange composition.

An interstellar comet has shattered speed records as it hurtled through our solar system, captivating astronomers and ...

Interstellar comet 3I/Atlas has moved within 300 million km of Earth as scientists continue tracking its rare journey.

There have been several findings and fresh observations of the interstellar comet in recent days. Here are some of the ...

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

The fractured comet C/2025 K1 (ATLAS) is now visible to skywatchers after breaking into multiple large pieces following a ...

Is the interstellar comet 3I/ATLAS spinning? That is the question currently dominating online astronomy circles, fueled by ...

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 ...