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An artist’s rendering depicts the atmosphere on Io, Jupiter’s volcanic moon, as it collapses during daily eclipses.

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An artist’s rendering depicts Io’s volcanic plumes creating the atmosphere in sunlight Image Courtesy of Southwest Research Institute For two hours of Io’s day (1.7 Earth days), it is eclipsed by Jupiter. The temperature drop freezes sulfur dioxide (SO2) gas, causing the atmosphere to “deflate.”
Image Courtesy of Southwest Research Institute