<p>Jupiter's moon Io in 1979 during Voyager 1's flyby. Seen in orange, green, and violet filters.
</p>
NASA/JPL-CalTech/Kevin M. Gill
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/53460575@N03">Kevin Gill</a> from Nashua, NH, United States
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/kevinmgill/22879001135/">Io - March 4 1979</a>