Titan as seen by Cassini on June 22, 2010, and Pluto as seen by New Horizons on July 14, 2015. Both worlds are viewed from a phase angle of 165 degrees -- nearly from behind. Both have atmospheres; particles in the atmospheres scatter sunlight forward toward New Horizons, lighting them up. The observing spacecraft are seeing the skies in all the locations where the Sun is rising or setting on the surface. The Pluto image has been downsized to match the scale of the Titan image.