A Crescent Callisto

This is a crescent view of Jupiter's moon Callisto taken by Voyager 1 on March 6, 1979.   Many of the pictures that were taken in this dataset smeared or missed Callisto, and all of the images are underexposed.  The smoothness of the day/night terminator is a reminder that for all its craters, Callisto is a very flat world.

Processed image Copyright Ted Stryk, Raw Data Courtesy NASA/JPL