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On Sept. 10, the Cassini spacecraft performs its closest flyby during the entire mission of the odd moon Iapetus, passing by about 1,640 kilometers (1,000 miles). Iapetus is a world of sharp contr...

Though much farther away from Cassini when the spacecraft acquired this image, Saturn's second-largest moon Rhea still dwarfs the brightest icy moon Enceladus in this scene. Rhea is 1,528 kilomete...

This image, taken on June 6, 2015 by NASA's Dawn spacecraft, shows Ceres from an altitude of 2,700 miles (4,400 kilometers). A mountain can be seen on the left. The western edge of Haulani crater c...

+ View High Res Team members of NASA's Cassini mission to Saturn gather in October 2010 at the Jet Propulsion Laboratory, Pasadena, Calif., where the mission is managed. Over 200 scientists, eng...

This image of Ceres is part of a sequence taken by NASA's Dawn spacecraft on May 4, 2015, from a distance of 8,400 miles (13,600 kilometers).

This image of Gegania AV-L-09, from the atlas of the giant asteroid Vesta, was created from images taken as NASA's Dawn mission flew around the object, also known as a protoplanet.

The Cassini spacecraft continues to observe brightness variations along the orbital direction within Saturn's B ring. This view looks toward the unlit side of the rings from about 53 degrees above...

This view of the two moons of Mars comes from a set of images taken by NASA's Mars rover Curiosity as the larger moon, Phobos, passed in front of the smaller one, Deimos, from Curiosity's perspecti...

                  Saturn's Sunlit Rings July 1, 2004     After becoming the first spacecraft to enter Saturn's orbit,...

This image, taken by NASA's Dawn spacecraft, shows a portion of the northern hemisphere of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). The image was taken on Sept. 21, 2015...

Dantu crater on Ceres, seen in this image from NASA's Dawn spacecraft at left, reveals structures hinting at tectonic processes that formed the dwarf planet's surface. Linear structures are spread ...

                  Intricate C Ring Details December 7, 2004   Full-Res: PIA06537   Saturn's inner C ring spreads across th...

Gazing off toward the horizon is thought-provoking no matter what body's horizon it is.

This Cassini image features a density wave in Saturn's A ring (at left) that lies around 134,500 km from Saturn. 

In this artist's rendering, a distant sun forms a halo (refracted sunlight by ice crystals) amid streamers of pure water ice particles, which spew into space from cracks in the south polar surface ...

Jets of water ice particles spew from Saturn's moon Enceladus in this image obtained by NASA's Cassini spacecraft on Aug. 13, 2010. 

Titan in Natural Color Full-Res: PIA06081 Despite the views of the surface of Saturn's Titan moon provided by the Cassini spacecraft...

This image of Ceres is part of a sequence taken by NASA's Dawn spacecraft on May 22, 2015, from a distance of 3,200 miles (5,100 kilometers) with a resolution of 1,600 feet (480 meters) per pixel.

Each image on this High Resolution Stereo Camera Image Composite (HRSC) mosaic is of the same location observed by Dawn's Framing Camera when it flew by Mars to complete the spacecraft's gravity as...

This Cassini image of Saturn's moon Enceladus shows a region containing bizarre, wrinkled terrain. Enceladus is covered with bright water ice. The part of its surface visible here appears to be la...

Swirls of Clouds in Infrared June 15, 2004 Full-Res: PIA05406 On its approach to Saturn orbit insertion, the narrow angle camera ...

These images from NASA's Dawn spacecraft show the ~20km diameter Numisia crater on asteroid Aster, after which Numisia quadrangle is named.

This image was acquired on 28 July 2008 with the nadir channel of the High Resolution Stereo Camera.

Saturn's Stripes May 31, 2004 Full-Res: PIA05398 This image shows the delicate banded nature of Saturn's atmosphere. Notable is t...

This image from NASA's Dawn spacecraft shows a fresh scarp rimmed crater with many boulders on asteroid Vesta's crater floor. These boulders have diameters of 100-200m, which is roughly the size of...