Add Yahoo as a preferred source to see more of our stories on Google. The Haleakala Observatory, left, houses one telescope for the ATLAS system. That system first spotted the object 3I/ATLAS, which ...

In the vast, uncharted realms of the cosmos, NASA’s telescopes have detected an eerie and peculiar celestial object. This enigmatic image, already shrouded in mystery, has only grown more perplexing, ...

A Harvard astronomer has proposed a bold theory about a mysterious interstellar object that has been observed accelerating away from our solar system at high speed. This acceleration, he suggests, ...

This cosmic visitor is now officially named 3I/ATLAS, and it appears to be a comet from another solar system. Reading time 3 minutes Update: July 3, 09:24 a.m. ET: On Wednesday, July 2, the ...