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

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.

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

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

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

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

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

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

There is something almost offensive about a sky so full of stars and so empty of company. That is what gives Richard ...