Saturn appears to NASA's Cassini's cameras as a thin, sunlit crescent in this unearthly view. Citizens of Earth, being so much closer to the Sun than Saturn, never get to enjoy a view of Saturn like this without the aid of our robot envoys.
Seen by NASA's Cassini spacecraft within the vast expanse of Saturn's rings, Prometheus appears as little more than a dot. But that little moon still manages to shape the F ring, confining it to its narrow domain.
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.
Tethys' trailing side shows two terrains that tell a story of a rough past. To the north (up, in image) is older, rougher terrain, while to the south is new material dubbed 'smooth plains' by scientists. This image was taken by NASA's Cassini spacecraft.
This view from NASA's Cassini spacecraft features a blue planet, Uranus, imaged by Cassini for the first time. Uranus is a pale blue in this natural color image because its visible atmosphere contains methane gas and few aerosols or clouds.
Saturn's winds race furiously around the planet, blowing at high speeds which form distinct belts and zones which encircle the planet's pole, as well as its famous hexagon as seen in this image from NASA's Cassini spacecraft.
NASA's Cassini spacecraft peers down though layers of haze to glimpse the lakes of Titan's northern regions. Titan has a hydrological cycle similar to Earth's, but instead of water, Titan's lakes and seas are filled with liquid methane and ethane.
Gravity measurements by NASA's Cassini spacecraft and Deep Space Network suggest that Saturn's moon Enceladus, which has jets of water vapor and ice gushing from its south pole, also harbors a large interior ocean beneath an ice shell.
Saturn's moon Prometheus orbits near some of its handiwork in the F ring in this image from NASA's Cassini spacecraft. Prometheus and its partner Pandora gravitationally sculpt and maintain the narrow F ring.
Two pairs of moons make a rare joint appearance. The F ring's shepherd moons, Prometheus and Pandora, appear just inside and outside of the F ring (the thin faint ring furthest from Saturn) as seen by NASA's Cassini spacecraft.
This artist's concept shows a possible model of Titan's internal structure that incorporates data from NASA's Cassini spacecraft. A model of Cassini is shown making a targeted flyby over Titan's cloudtops; Saturn and Enceladus appear at upper right.