NASA's Cassini spacecraft captured this image of Saturn as it views the planet and its expansive rings from all sorts of angles. Here, a half-lit Saturn sits askew as tiny Dione looks on from lower left.
Saturn's moon Tethys appears to float between two sets of rings in this view from NASA's Cassini spacecraft, but it's just a trick of geometry. The rings, which are seen nearly edge-on, are the dark bands above Tethys.
NASA's Cassini spacecraft captured this view of Saturn's moon Atlas (30 kilometers, or 19 miles across), with its smooth equatorial ridge, during a moderately close flyby on Dec. 6, 2015. The view offers one of Cassini's best glimpses of Atlas.
Tethys, dwarfed by the scale of Saturn and its rings, appears as an elegant crescent in this image taken by NASA's Cassini Spacecraft. Views like this are impossible from Earth, where we only see Saturn's moons as (more or less) fully illuminated disks.
During its closest ever dive past the active south polar region of Saturn's moon Enceladus, NASA's Cassini spacecraft quickly shuttered its imaging cameras to capture glimpses of the fast moving terrain below.
This view from NASA's Cassini spacecraft shows battered terrain around the north pole of Saturn's icy moon Enceladus. Craters crowd and overlap each other, each one recording an impact in the moon's distant past.
Titan and Saturn share a hazy appearance in this image from NASA's Cassini spacecraft, though Saturn is a gas giant with no solid surface to speak of, and Titan's atmosphere is a blanket surrounding an icy, solid body.
The night sides of Saturn and Tethys are dark places indeed. This image from NASA's Cassini spacecraft shows shadows are darker areas than sunlit areas, and in space, with no air to scatter the light, shadows can appear almost totally black.
Why does Saturn look like it's been painted with a dark brush in this infrared image, but Dione looks untouched? NASA's Cassini spacecraft took this image in a wavelength that is absorbed by -- methane.
This view from NASA's Cassini spacecraft looks toward Saturn's icy moon Dione, with giant Saturn and its rings in the background, just prior to the mission's final close approach to the moon on August 17, 2015.