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

Carbon isotopic measurements of the interstellar comet 3I/ATLAS reveal that it may have formed as long ago as 12 billion years and thus represents a preserved fragment of an…

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