Galileo acquired this global view of Io on its I32 orbit on October 16, 2001. A faint blue volcanic plume is visible at the upper right of the mosaic.
NASA / JPL / Ted Stryk
Planetshine on Io
The planetshine from Jupiter on Io in this Galileo I32 global view was enough to slightly light up Io's nighttime hemisphere. This image has been enhanced to emphasize the planetshine area. Unfortunately, subtle details in this area are not distinguishable due to Galileo SSI image compression.