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Prometheus, Io

The umbrella-shaped feature in this scene is the volcano Prometheus erupting on Io. The Prometheus plume reaches nearly 80 km into the vacuum of space and forms a bright doughnut-shaped deposit 250 km wide where it falls to the surface. Several dark arcuate "spokes" are visible within the plume.

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Uploaded on November 18, 2009
Taken on November 18, 2009