Tholin Formation in Titan's Upper Atmosphere

This graphic summarizes Cassini's 13 years orbiting Saturn, with moon flybys grouped into columns for each phase of the mission. 

Ceres' Haulani Crater is shown in these views from NASA's Dawn spacecraft. These views reveal variations in the region's brightness, mineralogy and temperature at infrared wavelengths.

This image of complex bright and dark material relationships in Occator Crater on Ceres was obtained by NASA's Dawn spacecraft on July 3, 2018 from an altitude of about 30 miles (48 kilometers).

Bright equatorial clouds give way to darker southern bands in this infrared Cassini spacecraft view taken with a filter sensitive to methane absorption in Saturn's atmosphere. Delicate shadows cas...

Capturing the interplay between light and shadow, the Cassini spacecraft looks toward the night side of Saturn where sunlight reflected off the rings has dimly illuminated what would otherwise be t...

This raw image obtained by NASA's Cassini spacecraft of Saturn's moon Rhea shows an old, cratered surface seen with a low sun angle, casting deep shadows on the crater floors. Cassini's wide-angle ...

As one NASA spacecraft sailed past the distant ice world of Pluto, collecting never-before-seen vistas and invaluable science data, another spacecraft turned its gaze in that direction from its out...

The Cassini spacecraft took a series of images on Sept. 9, 2006 as it watched the bright red giant star Aldebaran slip behind Saturn's rings. This type of observation is known as a stellar occultat...

This false color image from NASA's Dawn spacecraft of Ceres' Occator Crater shows differences in surface composition. The color blue is generally associated with bright material seems to be consist...

Saturn's rings cut across this view of the planet's largest moon, Titan. Dark albedo features on Titan (5,150 kilometers, or 3,200 miles across) and the moon's north polar hood are visible here. S...

Capturing the interplay between light and shadow, the Cassini spacecraft looks toward the night side of Saturn where sunlight reflected off the rings has dimly illuminated what would otherwise be t...

Dark ring shadows adorn the northern hemisphere of Saturn. The shadows have loosened their grip on the north compared to when Cassini arrived in 2004 (see Saturn's Blue Cranium), and presently cont...

This raw, unprocessed image of Saturn's moon Rhea was taken on Jan. 11, 2011, during the “R-3” flyby. The flyby returned Cassini's best imaging of Rhea to date. At closest approach, Cassini flew ju...

This image, taken by NASA's Dawn spacecraft, shows a portion of the northern hemisphere of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). The image was taken on Sept. 22, 2015...

The terrain model of Vesta's southern hemisphere shows a big circular structure, its rim rising above the interior of the structure. This false-color map of the giant asteroid Vesta is from the fra...

This graphic of an enhanced color image from NASA's Dawn spacecraft shows a theoretical path of a water molecule on Ceres.

This view, made using images taken by NASA's Dawn spacecraft, features a tall conical mountain on Ceres. Elevations span a range of about 5 miles (8 kilometers) from the lowest places in this regio...

On its fourth and final targeted flyby of Rhea, the Cassini spacecraft provided this stunning view of the ancient and heavily cratered surface. Billions of years of impacts have sculpted Rhea's sur...

Interesting geological details on Enceladus can be seen in modest-resolution Cassini spacecraft views like this one. At bottom is the wrinkled and generally crater-free terrain near the moon's sout...

This time-lapse animation of two true-color images taken 12 minutes apart neatly captures storm movement in the southern hemisphere of Jupiter. 

High-Altitude Clouds

This image of a small boulder on Ceres was obtained by NASA's Dawn spacecraft on June 10, 2018 from an altitude of about 24 miles (38 kilometers).

This image of Ceres is part of a sequence taken by NASA's Dawn spacecraft on May 7, 2015, from a distance of 8,400 miles (13,600 kilometers).

NASA's MESSENGER spacecraft discovered strange hollows on the surface of Mercury. 

NASA's Dawn spacecraft spied Achita Crater on Ceres in this view captured on June 3, 2016, at a distance of about 240 miles (385 kilometers) above the surface. Achita is named for a Nigerian god of...