06 / 16 · The Giants · 1979–1981

Io

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Voyager 1's images reveal active volcanoes on Io, the first ever found beyond Earth.

1. 8 Mar 1979 A plume on the limb of Io: the first active volcano found beyond Earth. source

Credits: NASA/JPL · NASA/JPL-Caltech · NASA/JPL/USGS · NASA/JPL/University of Arizona

Data: NASA/JPL Horizons