SPHEREx Detects Dramatic Ice Activity on Interstellar Visitor 3I/Atlas
NASA’s SPHEREx mission has detected a dramatic surge in sublimation on the interstellar comet 3I/Atlas following its close approach to the Sun. Observations show carbon dioxide, carbon monoxide, and water vapor emissions spiked as previously insulated ices beneath the comet’s surface became active inside the solar system’s ice line. Earlier in 2025, the comet’s activity was dominated by large icy grains releasing mainly carbon dioxide, … Continue reading SPHEREx Detects Dramatic Ice Activity on Interstellar Visitor 3I/Atlas
