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

The findings surprised researchers, who used the comet's composition to better understand the environment in which it formed.

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

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

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

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

An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the ...

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

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

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar ...

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

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