The interstellar visitor likely formed around 12 billion years ago in an ancient planetary system.

As interstellar comet 3I/ATLAS began moving away from the Sun in December 2025, astronomers took the opportunity to turn NASA’s powerful James Webb Space

All signs were already indicating that interstellar comet 3I/ATLAS was unlike anything we'd ever seen.

The evidence is mounting: this interstellar visitor is even older and weirder than anyone thought