Road-Tripping by Dione and Rhea
NASA's Cassini spacecraft took these two wide-angle images of the Saturnian moons Dione and Rhea on Oct. 17, 2010. The images are raw images that have not been validated or calibrated. The image of Dione (left) was taken from approximately 36,065 kilometers (22,410 miles) away. The image of Rhea (right) was taken from approximately 39,168 kilometers (24,338 miles) away. Of the five big icy moons of Saturn, Dione and Rhea are often considered a pair because they orbit close to each other, are darker than the others, and exhibit similar patterns of light reflecting off them. These new images, however, highlight the differences in their geological histories.
Image credit: NASA/JPL/SSI