Saturn’s second-largest moon Rhea passes across the face of the ringed planet in this image, color-combined from three raw images taken by Cassini on May 8, 2010. The rings are seen on edge here, a dark horizontal stripe running underneath the cratered 950-mile-wide moon, their wide shadows cast onto Saturn’s atmosphere below.

I really love images like this that give a sense of scale and perspective to the fascinating and beautiful Saturnian system.

Image: NASA/JPL/SSI/J. Major