This false-color view taken by NASA's Cassini spacecraft is one of a panel of three images of Saturn's moon Iapetus showing the boundary of the global 'color dichotomy' on the hemisphere of this moon facing away from Saturn.
The Cassini spacecraft looks toward Rhea's cratered, icy landscape with the dark line of Saturn's ringplane and the planet's murky atmosphere as a background. Rhea is Saturn's second-largest moon, at 1,528 kilometers (949 miles) across.
Large regions of Saturn's night side are illuminated by the planet's gleaming rings. Except for a sliver of the sunlit crescent at left, this view shows a part of the planet lit almost entirely by ringshine.
Saturn's shadow interrupts the planet's rings, leaving just thin slivers of the rings visible in this image, which shows a pair of the planet's small moons. Helene is in the center top of the image, Epimetheus is in the lower right.
NASA's Cassini spacecraft captured Saturn's moon Prometheus, orbiting near the streamer-channels it has created in the thin F ring, casts a shadow on the A ring in this image taken a little more than a week after the planet's August 2009 equinox.
Long shadows stretch away from the towering edge waves created by the gravity of the moon Daphnis in this image taken by NASA's Cassini spacecraft a little more than a week before Saturn's August 2009 equinox.