Planetary archive: Io

Jupiter's moon Io, the most volcanically active place in the solar system. Credit: NASA / JPL / University of Arizona

Jupiter’s moon Io, the most volcanically active place in the solar system. Credit: NASA / JPL / University of Arizona

This is a beautiful image of Jupiter’s moon Io, taken by the Galileo spacecraft on September 19, 1997. Io is slightly larger than Earth’s moon and is the most volcanically active place in the solar system. Sulfur dioxide and various other sulfurous materials blanket the surface, creating a colourful landscape on this “pizza moon” as it is sometime referred to. A lovely but deadly environment!

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