Interstellar Comet 3I/ATLAS Stuns Scientists – Brightening, Blue Glow & Mystery Acceleration
Comet 3I/ATLAS, the third known interstellar object to enter the solar system, was discovered July 1, 2025, by the ATLAS survey in Chile. It reached perihelion near October 29, passing just inside Mars’s orbit and brightening unusually fast while turning blue. NASA reported non-gravitational acceleration, likely from intense outgassing. Nickel vapor was detected in its coma at distances too cold for such metals to normally vaporize.