A mystery interstellar object spotted last week by astronomers could be the oldest comet ever seen, according to scientists. Named 3I/Atlas, it may be three billion years older than our own solar system, suggests the team from Oxford university.

I/ATLAS isn't just fascinating because it is the third interstellar visitor found in the solar system; new research suggests it's also the oldest comet ever seen, at over 7 billion years old.

British astronomers have discovered a mysterious object from space that is likely the oldest comet ever observed.This comet called, 3I/ATLAS contains a lot of water ice and is unique because it didn't come from our solar system.