For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

Comet 3I/ATLAS was full-on erupting into space in December 2025, after its close flyby of the sun, causing it to significantly brighten. Even water ice was quickly sublimating into gas in ...

Observations of interstellar object 3I/ATLAS show increased water, carbon dioxide, and organic gas release after its passage near the Sun, based on data from NASA’s SPHEREx mission ...

The arrival of 3I/ATLAS in our solar system spawned multiple proposals for a rendezvous mission to study it up close. As the third interstellar object (ISO) ever detected, the wealth of information ...

Is 3I/ATLAS just a comet — or an intergalactic ark? A NASA spacecraft has discovered organic chemicals on 3I/ATLAS, which ...