Simulated view of Io
Voyager 1 and 2,
amateur image processing
This view of Io was produced from Galileo and Voyager data to match the one returned from New Horizons on February 28, 2007. Comparing the two reveals changes on Io's surface in the years between the missions.
NASA / JPL / Björn Jónsson
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Original image data dated on or about February 28, 2007