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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.

C. Alexander Gate, a feature on comet 67P/Churyumov-Gerasimenko, is named in honor of Claudia Alexander, a NASA scientist who passed away in July 2015.

Artist's concept of NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft in orbit above the moon as dust scatters light during the lunar sunset.

This image from NASA's Dawn spacecraft shows craters of different sizes and shapes in Vesta's southern hemisphere. The freshest craters can be classified as fresh scarp rimmed craters and the less ...

The brilliant core of the F ring displays a breakaway clump of material, possibly related to the other objects the Cassini spacecraft has witnessed in the dynamic ring in the past few years of obse...

This image from NASA's Dawn spacecraft shows many linear and curvilinear grooves running roughly diagonally across asteroid Vesta's Gegania quadrangle.

As millions of Americans watched the total solar eclipse that crossed the continental United States Aug. 21, the international Hinode solar observation satellite captured its own images of the awe-...

This map is a mosaic of images obtained by NASA's Dawn's framing camera during the high-altitude mapping orbit phase. This map shows the distribution of dark materials on the surface of asteroid Ve...

False-color images from NASA's Cassini spacecraft show the development of a hood of high-altitude haze ­- which appears orange in this image -- forming over the south pole of Saturn's moon Titan. T...

This is the first picture of a black hole.

In this image, Cassini sees Saturn and the rings through a haze of Sun glare on the camera lens.

This false-color composite image, constructed from data obtained by NASA's Cassini spacecraft, shows the glow of auroras streaking out about 1,000 kilometers (600 miles) from the cloud tops of Satu...

This highly oblique image shot over northwestern part of the African continent captures the curvature of the Earth and shows its atmosphere. You can see clouds and even the occasional thunderhead. ...

Io, the most volcanic body in the solar system is seen in the highest resolution obtained to date by NASA's Galileo spacecraft. 

Breathtaking Vista November 23, 2004 Full-Res: PIA06526 This dazzling view looks beyond gigantic storms near Saturn's south pole ...

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...

Cassini captured this mosaic of images showing the northern lakes and seas of Saturn's moon Titan on Feb. 17, 2017. 

The dark Cassini Division, within Saturn's rings, contains a great deal of structure, as seen in this color image. The sharp inner boundary of the division (left of center) is the outer edge of the...

The highly reflective moon Enceladus appears as a bright dot beyond a crescent Saturn in this Cassini image.

This image from NASA's Dawn spacecraft shows a large crater with several smaller craters at the edge on the giant asteroid Vesta. Rough texture in the crater wall at far right may be the underlying...

Colorful Threads and Shadows September 16, 2004 Full-Res: PIA06114 Saturn's faintly banded atmosphere is delicately colored and i...

Several sets of shadows are cast onto the A ring in this image taken about a week after Saturn's August 2009 equinox. Near the middle of the image, shadows are cast by vertically extended clumps i...

The crater on asteroid Vesta shown in this image from NASA's Dawn spacecraft was emplaced onto the ejecta blanket of two large twin craters. Commonly, rays from impact craters are brighter than the...

The line of Saturn's rings disrupts the Cassini spacecraft's view of the moons Tethys and Titan. Larger Titan (3,200 miles, or 5,150 kilometers across) is on the left. Tethys (660 miles, or 1,062 ...

This map of Saturn's moon Titan shows the location mapped with the Cassini radar mapper using its Synthetic Aperture Radar imaging mode on April 30, 2006. The global map shows the areas mapped so...