Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion ...

Astronomers turned the Allen Telescope Array toward interstellar comet 3I/ATLAS, formally designated C/2025 N1 (ATLAS), ...

NASA's James Webb Space Telescope is finding clues that are leading scientists toward the origins of the interstellar comet ...

Astronomers first spotted Comet 3I/ATLAS in June 2025, and it was later confirmed as an interstellar visitor that originated ...

Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

One year ago, on July 1 2025, astronomers discovered a fascinating new object moving through the Solar System. Detected by ...

The Hubble Space Telescope image of the interstellar comet 3I/ATLAS on July 21, 2025, when the comet was 277 million miles ...

An interstellar comet that recently passed through the solar system may have formed as long as 12 billion years ago, making ...

Using carbon isotopes in the comet to estimate its age, the authors believe it may be even more ancient than earlier ...

Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents ...

SETI scientists searched the interstellar object 3I/ATLAS for radio signals that could indicate extraterrestrial technology ...

SETI scanned 3I/Atlas for more than seven hours and detected no signs of extraterrestrial technology; The comet is only the ...