Comet 3I/ATLAS brightens and turns green as it nears Earth, revealing interstellar composition and early star system origin
Interstellar comet 3I/ATLAS is now emitting a distinct green glow as it nears Earth, a transformation attributed to the vaporization of ice and dust after its close solar approach. This color change, caused by diatomic carbon molecules, offers a rare glimpse into the composition and behavior of objects from beyond our solar system.
