3I/ATLAS is only the third known interstellar visitor, hence the prefix “3I.” The second known interstellar body, Comet 2I/Borisov, was discovered by the Russian astronomer Gennady Borisov in August ...

Public fascination with the interstellar object 3I/ATLAS intensified this week after a surge of online posts claimed the visitor was aligned with newly discovered comet C/2025 R2 (SWAN) in what some ...

Scientists say that 3I/ATLAS has likely been traveling through interstellar space for a long time. Based on how fast it was ...

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 ...

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

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

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 ...

Comet C/2025 K1 (ATLAS) was discovered barrelling towards the sun on May 24, 2025 and is believed to have originated from the ...