Saturn's Moons - Frame 6

This movie still captures the moons Mimas, Enceladus, and Dione as they begin their race across Saturn's disk. The still is from a movie created from images taken by NASA/ESA Hubble Space Telescope. It reveals the planet's rings tilted nearly edge-on toward the Sun, an event that occurs once every 15 years. Because of this special alignment, the moons cast shadows on the planet and its rings.