Comet 3I/ATLAS brightens and turns green as it nears Earth, revealing interstellar composition and early star system origin |
Astronomers have captured striking new images showing that the interstellar comet 3I/ATLAS is not only brightening but also taking on a distinct green hue as it approaches Earth. Observed with the Gemini North telescope in Hawaii, the comet’s transformation follows its close approach to the Sun at the end of October, when its surface heated…