Our solar system's famous "invader" might be as old as the Milky Way itself.

Interstellar comet 3I/ATLAS may be nearly 12 billion years old — so ancient its star system may no longer exist

Source: space
Source Link: https://www.space.com/astronomy/comets/interstellar-comet-3i-atlas-may-be-nearly-12-billion-years-old-so-ancient-its-star-system-may-no-longer-exist