3I/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.

Astronomers say new interstellar visitor 3I/ATLAS is 'very likely to be the oldest comet we have ever seen'

Source: space
Source Link: https://www.space.com/astronomy/asteroids/astronomers-say-new-interstellar-visitor-3i-atlas-is-very-likely-to-be-the-oldest-comet-we-have-ever-seen