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.

PNSPNS
Dec 15, 2025 - 16:36
 0
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.

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