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.
As seen by NASA's Cassini spacecraft, the surface of Dione is covered in craters, reminding us of the impacts that have shaped all of the worlds of our solar system; the surface also bears linear features that suggest geological activity in the past.
Only a sharp and careful eye can make out the subtle variations in Titan's clouds when viewed in visible light by NASA's Cassini spacecraft. This infrared image clearly reveals a band around the Titan's north pole.
The image on the left shows Cassini's view on approach to Phoebe, while the right shows the spacecraft's departing perspective. As it entered the Saturn system, NASA's Cassini spacecraft performed its first targeted flyby of one of the planet's moons.
Prometheus is caught in the act of creating gores and streamers in the F ring. Scientists believe that Prometheus and its partner-moon Pandora are responsible for much of the structure in the F ring as shown by NASA's Cassini spacecraft.