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flag Comet 3I/ATLAS released water vapor at record distance from the Sun, surprising scientists.

flag On October 30, 2025, interstellar comet 3I/ATLAS reached its closest point to the Sun, revealing unexpected water vapor release despite being nearly three times farther from the Sun than Earth. flag NASA’s Swift Observatory detected hydroxyl gas, a sign of water, at a rate of about 40 kg per second, challenging assumptions about when comets typically activate. flag The 7-billion-year-old object, the oldest ever studied, is now fading from view but will reappear in mid-November for further observation.

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