Mystery deepens as interstellar comet 3I/ATLAS is getting greener and brighter as it nears Earth. Scientists reveal reason behind stunning colour change

Interstellar comet 3I/ATLAS has once again baffled scientists and astronomers with its increasing brightness and striking green hue as it nears Earth. Comet 3I/ATLAS will reach its closest point to Earth on December 19 and astronomers expect it to shine even more at that time. This change in colour of comet 3I/ATLAS reveals interstellar composition and early star system origin.

Published: December 15, 2025 10:20 am

Source: The Economic Times — Read original