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Hot Moon
Featured on October 3, 2019
Io, one of the largest moons of Jupiter, passes in front of the planet's clouds in this false-color image from the Galileo spacecraft. Io is the most volcanically active body in the solar system, with more than 400 known volcanic features. The largest is Loki Patera -- a pool of lava that covers an area the size of New Jersey. [NASA/JPL/Univ. Arizona]
