Scientists have created a geologic map of Io, one of the moons of Jupiter. Io, which experiences gravitational pull from Jupiter as well as from the planet's other moons, has much more volcanic activity than Earth. "Knowledge of Io's volcanic activity derived from geologic mapping is an important contribution to our understanding of the nature and diversity of volcanism in our solar system," according to David Crown of the Planetary Science Institute. The map was derived from images taken by Voyager 1 and 2 and from the Galileo orbiter.
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