In 2000, NASA’s Galileo spacecraft mapped Jupiter's moon Io’s volcanoes at temperatures above 1,000°C. 26 years later, the data still reveal one of the solar system’s strangest volcanic worlds

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Galileo spacecraft data revealed Io's extraordinary volcanic landscape and intense heat. Pele volcano showed temperatures reaching 1,500 degrees Celsius, far exceeding Earth's volcanoes. The spacecraft also detected sulfur dioxide ice within a caldera and an unidentified volcanic plume substance.