Io in Eclipse

This view of the volcanic plains of Neptune's moon Triton was produced using topographic maps derived from images acquired by NASA's Voyager spacecraft during its August 1989 flyby, 20 years ago th...

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

Booters Separating

This composite, false-color view of Venus' south pole was captured by VIRTIS onboard the European Space Agency's Venus Express.

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

+ Unannotated version These images from NASA's Cassini spacecraft show one of the large seas and a bounty of smaller lakes on Saturn's moon Titan. Scientists saw these small lakes in data obtain...

This ringscape shows the outermost part of the rings' spoke-forming region, the other edge of the B ring, and the regular bands of material within the Cassini Division. Spokes are only seen in Satu...

These images from NASA's Dawn spacecraft show part of the grooved terrain in asteroid Vesta's Pinaria quadrangle, which is in the southern hemisphere. Large-scale grooves and depressions can be see...

The Cassini spacecraft studies the dynamics of Saturn's blustery cloud bands as spring approaches in the northern hemisphere. Janus casts its shadow onto Saturn at right, just above the curving s...

This image from NASA's Dawn spacecraft shows a portion of Homshuk Crater, left, on Ceres. This crater was named for a corn spirit originating with the Popoluca people of southern Mexico.

A small moon travels its circuit just outside the main rings of Saturn. Epimetheus (116 kilometers, 72 miles across) is absolutely dwarfed by the giant planet. This view looks toward the unillumin...

Craters dot Dione's high northern latitudes, and, farther south, wispy fractures stretch across the moon's equator and mid-latitudes. To learn more about Dione's wisps, see Scratches on Dione. L...

These two gray-scale images from NASA's Space Shuttle show part of the Nile River, near the Fourth Cataract in Sudan. The top photograph was originally taken with color infrared film from Space Shu...

MESSENGER's Earth flyby on Aug. 2, 2005, not only adjusted the spacecraft's path to Mercury - the gravity assist maneuver allowed the spacecraft team to test several MESSENGER science instruments b...

NASA's Dawn spacecraft will be getting an up-close look at the dwarf planet Ceres starting in late March or the beginning of April 2015. This graphic shows the science-gathering orbits planned for ...

This image from NASA's Juno mission captures the dynamic nature of Jupiter's northern temperate belt. The view reveals a white, oval-shaped anticyclonic storm called WS-4. 

The moon Janus casts a shadow on Saturn's A ring but misses the thin F ring in this image captured as the planet approached its August 2009 equinox. The moon itself is not pictured, and the shadow...

It's difficult not to think of an egg when looking at Saturn's moon Methone, seen here during a Cassini flyby of the small moon. The relatively smooth surface adds to the effect created by the oblo...

A dynamical interplay between Saturn's largest moon, Titan, and its rings is captured in this view from NASA's Cassini spacecraft.

This is the most accurate natural color images of Pluto taken by NASA's New Horizons spacecraft in 2015.

The bright arc within Saturn's G ring is shown truncated by the shadow of the planet at the bottom of this image.

This three-image mosaic is the highest resolution view yet obtained of Enceladus' north polar region.

Complex and unique canyon systems appear to have been intricately carved into older terrain by the ample flow of liquid methane rivers on Saturn's moon Titan, as seen in this radar image taken by N...

The moons Mimas and Janus seem insignificant in front of the immensity of Saturn in this Cassini spacecraft image. Mimas (396 kilometers, or 246 miles across) is visible above the rings near the c...

Sunlight scatters through Saturn's rings, emerging on the unilluminated side. Prometheus (102 kilometers, or 63 miles across, lower right) and Pandora (84 kilometers, or 52 miles across, upper left...