Interstellar comet likely far older than Solar System: astronomers (opens in new tab)

The comet 3I/ATLAS is just the third visitor from beyond our Solar System that humanity has ever observed, its unusual brightness offering scientists an unprecedented opportunity to study something that came from elsewhere in the galaxy. After being spotted in July last year, the space rock prompted excitement online, with one prominent Harvard researcher speculating it could be an alien spacecraft -- a theory that NASA shot down. Now, observations by the world's most powerful telescopes are ...