Great Dark Spot

These raw, unprocessed images of Saturn's moon Dione were taken on Dec. 12, 2011, by NASA's Cassini spacecraft. Although Cassini obtained more detailed images on previous flybys of Dione, this was ...

This excellent view of the faint E ring -- a ring feature now known to be created by Enceladus -- also shows two of Saturn's small moons that orbit within the ring, among a field of stars in the ba...

Saturn casts its shadow on the rings in this Cassini image that also shows how the rings reflect sunlight onto the dark side of the planet. Here Saturn appears dimly illuminated by this ringshine. ...

Streamers, swirls and vortices roll across the dynamic face of Saturn. Unlike Earth, where most of the weather is driven by the Sun, Saturn's storms and circulation are driven in part by internal ...

This view, taken on Oct. 26, 2016, from NASA's Dawn spacecraft shows Meanderi Crater on Ceres, seen at lower right. Meanderi hosts several medium-sized craters within its walls.

Viking 2 Orbiter image of the Martian satellite Deimos taken from 1400 km.

In this extremely narrow angle field-of-view artist's rendering Iapetus, with its notable dark surface, occupies the foreground with a dimly lit crescent Saturn low in the sky. Iapetus' surface sh...

The puzzling, fascinating surface of Jupiter's icy moon Europa looms large in this newly-reprocessed color view, made from images taken by NASA's Galileo spacecraft in the late 1990s.

The center of Ezinu Crater on Ceres is seen in this view from NASA's Dawn spacecraft. The crater features a network of canyon-like features. Ezinu measures about 72 miles (116 kilometers) in diamet...

In this unique mosaic image combining high-resolution data from the imaging science subsystem and composite infrared spectrometer aboard NASA's Cassini spacecraft, pockets of heat appear along one ...

Behold Saturn's Magnetosphere! July 1, 2004 Full-Res: PIA06345 Saturn's magnetosphere is seen for the first time in this image ta...

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.

This image from NASA's Dawn spacecraft is located in Marcia quadrangle, just south of Vesta's equator. It has a scalloped shaped rim and the top part of the rim is more degraded than the rest.

From the Cassini spacecraft's perspective, Saturn's moon Dione passes in front of the moon Tethys in this mutual event. These three images were each taken about one minute apart. These images are ...

This image of Justina AV-L-29, 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.

Two moons that have profound impacts on the rings, Mimas and Prometheus, are seen here with the F ring. Mimas (396 kilometers, or 246 miles across), the larger and much more distant of the moons, ...

During a close flyby of Titan on March 31, 2005, Cassini's cameras got their best view to date of the region east of the bright Xanadu Region. This mosaic consists of several frames taken by the na...

Cassini imaging scientists have waited years for the sun to reveal the hexagonal wave pattern in the clouds of Saturn's north pole, part of which can be seen at the top of this image from the Cassi...

A small moon clings to the edge of Saturn's A ring. External to the moon is the thin and contorted F ring. The flattened shape of Atlas (32 kilometers, or 20 miles across) is just discernible. See...

The Cassini spacecraft looks at a brightly illuminated Enceladus and examines the surface of the leading hemisphere of this Saturnian moon.

After a couple of years in high-inclination orbits that limited its ability to encounter Saturn's moons, NASA's Cassini spacecraft returned to Saturn's equatorial plane in March 2015.

Cassini's radar instrument obtained another in its series of north polar swaths of Titan on April 10, 2007. This image exposes more of the transition between the mid-latitudes and the polar area, ...

Atlas Found! June 29, 2004 Full-Res: PIA06076 The Cassini spacecraft has sighted the tiny moon Atlas, which is seen here for the ...

Artist rendering of NASA's Dawn spacecraft approaching Mars.

NASA's Dawn spacecraft took this image of Hakumyi Crater on Ceres, visible left of center. Evidence for organics was also found at the 4-mile (6.5 kilometer) wide fresh crater on the southern rim o...