RTG fit and test

These images show part of asteroid Vesta's equatorial region, which contains impact craters and troughs (linear depressions).

A view of the far side of the Moon as it passed in front of Earth from a vantage point more than a million miles away.

In this rare image taken on July 19, 2013, the wide-angle camera on NASA's Cassini spacecraft has captured Saturn's rings and our planet Earth and its moon in the same frame.

A bright spoke extends across the unilluminated side of Saturn's B ring about the same distance as that from London to Cairo. The background ring material displays some azimuthal (i.e., left to rig...

NASA's Cassini spacecraft obtained this unprocessed image of Saturn's moon Helene on June 18, 2011. This image has not been validated or calibrated. A validated/calibrated image will be archived w...

Family Portrait September 13, 2004 Full-Res: PIA06475 A stately Saturn poses for a portrait with five of its moons in this Cassini sp...

Seen from the unlit side of Saturn's A ring, the shadow of the moon Janus is cast across the Encke Gap. The varying darkness of the shadow is due to varying particle density across the ring. To le...

This image shows the Minotaur V rocket that will carry NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) on a pad at NASA's Wallops Flight Facility at Wallops Island, Va.

A surge in brightness appears on the rings directly opposite the Sun from the Cassini spacecraft. This "opposition surge" travels across the rings as the spacecraft watches (see Surging Onward ). ...

Ever-changing kinks and wiggles define Saturn's dynamic F ring. The evolution of F-ring features like those seen here are of interest to ring scientists because they reveal a great deal about the p...

Titan's First Close-Up October 26, 2004 This image is one of the closest ever taken of Saturn's hazy moon Titan. It was captured by Cassini's imaging scien...

NASA's Cassini spacecraft captures a composite near-true-color view of the huge storm churning through the atmosphere in Saturn's northern hemisphere. This storm is the largest and most intense ob...

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...

This image from NASA's Dawn spacecraft shows the brightest area seen on asteroid Vesta so far. It shows a crater located inside the rim of the Rheasilvia basin at the south pole of Vesta.

As Cassini approached Titan on Aug. 21, 2005, it captured this natural color view of the moon's orange, global smog. Titan's hazy atmosphere was frustrating to NASA Voyager scientists during the fi...

Basking in sunlight, Enceladus looks peaceful and quiet while unseen jets of vapor and icy particles shoot from the south polar terrain of this active moon. The jets can't be seen here, but to wat...

NASA's Dawn instrumentation poster, part of the Dawn Mission Art series.

The spinning vortex of Saturn's north polar storm resembles a deep red rose of giant proportions surrounded by green foliage in this false-color image from NASA's Cassini spacecraft. 

Cassini in the environmental test chamber, 25' Space Simulator in building 150 at NASA's Jet Propulsion Laboratory. 

Students from Shirley Avenue Elementary School in Reseda, Calif., visited NASA's Jet Propulsion Laboratory to see the image they selected. Robert T. Mitchell, Cassini program manager, presented th...

This high-resolution infrared image was taken during the Cassini spacecraft's closest approach to Titan on Oct. 26, 2004. These images were obtained by Cassini's visual and infrared mapping spectro...

This computer generated montage shows Neptune as it would appear from a spacecraft approaching Triton, Neptune's largest moon at 2706 km (1683 mi) in diameter. 

On July 14 the telescopic camera on NASA's New Horizons spacecraft took the highest resolution images ever obtained of the intricate pattern of "pits" across a section of Pluto's prominent heart-sh...

This image NASA's Dawn spacecraft shows a fresh scarp rimmed crater on asteroid Vesta with a remarkable distribution of bright and dark material in its interior.

This raw image was returned by the ESA Huygens DISR camera after the probe descended through the atmosphere of Titan. It shows the surface of Titan with ice blocks strewn around. The size and dista...