The moon Iapetus, like the 'force' in Star Wars, has both a light side and a dark side. Scientists think that Iapetus' dark/light asymmetry was actually created by material migrating away from the dark side.
Named after a Japanese paradise, NASA's Cassini spacecraft spies the Senkyo region of Titan), a bit less welcoming than its namesake with a very inhospitable average temperature of approximately 290 degrees below zero Fahrenheit (-180 degrees Celsius).
Many color images are taken by NASA's Cassini spacecraft in red light so scientists can study the often subtle color variations of Saturn's rings. These variations may reveal clues about the chemical composition and physical nature of the rings.
Two masters of their craft are caught at work shaping Saturn's rings captured by NASA's Cassini spacecraft. Pandora (upper right) sculpts the F ring. Meanwhile, Daphnis is busy holding open the Keeler gap (bottom center).
NASA's Cassini orbiter shows that Tethys appears to be peeking out from behind Rhea, watching the watcher. Scientists believe that Tethys' surprisingly high albedo is due to the water ice jets emerging from its neighbor, Enceladus.
Nature is an artist, and this time she seems to have let her paints swirl together a bit. What the viewer might perceive to be Saturn's surface captured by NASA's Cassini orbiter is really just the tops of its uppermost cloud layers.
The moons visible in this image from NASA's Cassini spacecraft, Pandora and Atlas, are quite small by astronomical standards, but the rings are also enormous. From one side of the planet to the other, the A ring stretches over 170,000 miles (270,000 km).
NASA's Cassini spacecraft captures a rare family photo of three of Saturn's moons that couldn't be more different from each other. Shown here are Tethys (center), Hyperion (upper left), and Prometheus (lower left).
NASA's Voyager 2 spacecraft flew by Triton, a moon of Neptune, in the summer of 1989. Dr. Paul Schenk, a scientist at the Lunar and Planetary Institute in Houston, used Voyager data to construct the best-ever global color map of Triton.
This image from NASA's Cassini spacecraft, one of those acquired in the survey conducted by the Cassini imaging science team of the geyser basin at the south pole of Enceladus, was taken as Cassini was looking across the moon's south pole.
Seen by NASA's Cassini spacecraft, Tethys, like many moons in the solar system, keeps one face pointed towards the planet around which it orbits. Tethys' anti-Saturn face is seen here, fully illuminated, basking in sunlight.