Add Yahoo as a preferred source to see more of our stories on Google. Those concerned that 3I/ATLAS' arrival to our solar system meant that some sort of alien invasion was imminent can breathe a sigh ...

NASA's Hubble Space Telescope and an ESA orbiter bound for Jupiter both recently glimpsed 3I/ATLAS. The comet will make its closest approach to Earth in December but poses no threat and is not visible ...

3I/ATLAS is the enigmatic 'comet' that has captivated the globe in recent weeks. Fresh observations now suggest it might actually be an extraterrestrial spacecraft. This speculation comes after ...

A rare interstellar object is hurtling toward the sun and, despite viral claims, experts say it's just a normal comet, although it's showing some unexpected behavior. 3I/Atlas marks the third ...

Since early July, telescopes around the world have been tracking just our third confirmed interstellar visitor, the comet 3I/ATLAS—3I, for third interstellar, and ATLAS (Asteroid Terrestrial-impact ...

Long before telescopes, radio signals, or Harvard professors with strong views on aliens, early Homo sapiens stared at the sky and wondered whether someone out there existed and understood the world ...