NASA's Galileo spacecraft acquired its highest resolution images of Jupiter's moon Io in July 1999 during its closest pass to Io since orbit insertion in late 1995. This color mosaic uses the near-infrared, green and violet filters (slightly more than the visible range) of the spacecraft's camera and approximates what the human eye would see.

Comparison of this image to previous Galileo images reveals many changes due to the ongoing volcanic activity.


Photo courtesy NASA/Jet Propulsion Laboratory/Caltech.


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