Io and the Prometheous feather

Credit: Galileo Project, JPL, NASA

This is a picture of Io, Jupiter satellite, taken by Galileo in 1997 and recently analyzed.
We can see very clearly 2 feathers of sulfurous eruptions (calculated height: about 75km):superb!
These eruptions were detected at first per Voyager in 1979 and are still active today.

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