Io in Eclipse

This image mosaic of Vesta's south pole is generated from dozens of individual images from the framing camera aboard NASA's Dawn spacecraft. This view is centered on the asteroid's south pole, whic...

Relatively young craters, with sharp crater rims and streaks of bright material, are the focus of this view of Ceres from NASA's Dawn spacecraft, taken on Oct. 17, 2016.

Saturn's moon Atlas plies the Roche Division between the A ring and the thin F ring. Atlas (30 kilometers, or 19 miles across) is near the center of the image. Bright specks in the image are backg...

Since its discovery in 2005, Pluto's moon Hydra has been known only as a fuzzy dot of uncertain shape, size, and reflectivity. 

This image from NASA's Dawn spacecraft shows a part of the heavily cratered terrain in asteroid Vesta's northern hemisphere. Some of the craters have fresh, sharp rims, which suggests that they are...

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).

The shadow of the moon Tethys cuts across the C ring in this image taken as Saturn approaches its August 2009 equinox. The novel illumination geometry created as Saturn approaches its August 2009 ...

This image composite was created with images taken during the Cassini spacecraft's closest flyby of Titan on April 16, 2005. Cassini's cameras have numerous filters that reveal features above an...

Spiral density waves in Saturn's A ring reveal the gravitational signatures of distant moons as they subtly tug on the countless particles orbiting in the ring plane. Resulting from a process call...

This topographic map from NASA's Dawn mission shows the two large impact basins in the southern hemisphere of the giant asteroid Vesta.

Entering Saturn's Magnetosphere with a Boom July 1, 2004 Full-Res: PIA06347 This graph illustrates the series of sonic booms that...

Blue Saturn March 19, 2004 Full-Res: PIA05383 Bands and spots in Saturn's atmosphere, including a dark band south of the equator ...

Engineers work on Cassini in the Payload Hazardous Servicing Facility at NASA's Kennedy Space Center.

The moon Tethys occupies the right foreground of this Saturnian scene. This view looks toward the anti-Saturn side of Tethys (1,062 kilometers, or 660 miles across) and toward the northern, sunlit...

A couple of craters share a crescent of lit terrain on Saturn's moon Rhea. Lit terrain seen here is on the trailing hemisphere of Rhea (1528 kilometers, or 949 miles across). This view is centered...

Accompanied by their teacher, Kathy Cooper, a group of students from Shirley Avenue Elementary School in Reseda, California, pose in front of a half-scale model of the Cassini spacecraft at JPL. T...

Named after a Japanese paradise, the Senkyo region of Titan (the dark area below and to the right of center) is a bit less welcoming than its namesake.

The Cassini spacecraft examines old and new terrain on Saturn's fascinating Enceladus, a moon where jets of water ice particles and vapor spew from the south pole. Newly created terrain is at the ...

Rhea has been heavily bombarded by impacts during its history. In this Cassini image the moon displays what may be a relatively fresh, bright, rayed crater near Rhea's eastern limb. Rhea is 1,528 k...

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...

A still camera on a sound trigger captured this intriguing photo of an airborne frog as NASA's LADEE spacecraft lifts off from Pad 0B at Wallops Flight Facility in Virginia.

The rim of the crater blocks sunlight coming from the right, creating a moody scene on Ceres. NASA's Dawn spacecraft took this image on June 16, 2016.

This image, taken by NASA's Dawn spacecraft, shows the surface of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). The image, with a resolution of 450 feet (140 meters) per pixe...

Dione floats past, with Saturn's rings beyond. This view looks toward the anti-Saturn side of Dione (1,126 kilometers, or 700 miles across). North is up. The darker terrain on the moon's trailing ...

This view is among the closest Cassini images of Tethys' icy surface taken during the Sept. 24, 2005 flyby. This false-color image, created with infrared, green and ultraviolet frames, reveals a w...