NASA/JPL’s Galileo unmanned space probe makes the closest flybys yet of Io, the volcanically hyperactive moon of Jupiter which made headlines when Voyager scientists spotted an eruption in 1980. The new images give the best view yet of Io’s inhospitable surface, including a volcanic crater, 47 miles across, named after the Brazilian god of thunder, Tupan Patera – an eye-searingly colorful region even in natural light.
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