This global color mosaic of Triton, taken in 1989 by NASA's Voyager 2 shows Triton, the largest satellite of Neptune. Triton has the coldest surface known anywhere in the solar system; it is so cold that most of Triton's nitrogen is condensed as frost.
NASA's Voyager 2 acquired this black and white image of Triton, Neptune's largest satellite, during the night of Aug. 24-25, 1989. Triton's limb cuts obliquely across the middle of the image. The field of view is about 1,000 km (600 miles) across.
This image was returned by NASA's Voyager 2 spacecraft on July 3, 1989. The planet and its largest satellite, Triton, are captured in view; Triton appears in the lower right corner at about 5 o'clock relative to Neptune.
On Jan. 24, 1986, NASA's Voyager 2 returned the highest-resolution picture of Titania, Uranus' largest satellite. Abundant impact craters of many sizes pockmark the ancient surface; most prominent features are fault valleys that stretch across Titania.
This image of Oberon, Uranus' outermost moon, was captured by NASA's Voyager 2 on Jan. 24, 1986. Clearly visible are several large impact craters in Oberon's icy surface surrounded by bright rays.
This color image from NASA's Voyager 2 was reconstructed by making a computer composite of three black and white images taken through red, green, and blue filters. Details on Triton's surface unfold dramatically in this sequence of approach images.
Triton High Resolution View of Northern Hemisphere
This is one of the most detailed views of the surface of Triton taken by NASA's Voyager 2 on its flyby of the large satellite of Neptune early in the morning of Aug. 25, 1989. The picture was stored on the tape recorder and relayed to Earth later.
These images taken by NASA's Voyager 2 show changes in the clouds around Neptune's Great Dark Spot (GDS) over a four and one-half-day period. From top to bottom the images show successive rotations of the planet an interval of about 18 hours.
This false-color view of the rings of Uranus was made from images taken by NASA's Voyager 2 on Jan. 21, 1986. All nine known rings are visible here; the somewhat fainter, pastel lines seen between them are contributed by the computer enhancement.
The concentric rings surrounding Valhalla are perhaps the most distinctive geological feature on Callisto. This NASA Voyager 1 close-up shows a segment of the ridged terrain.
This bulls-eye view of Neptune's small dark spot (D2) was obtained by NASA' s Voyager 2's narrow-angle camera on Aug. 24, 1989, when Voyager 2 was within 1.1 million km (680,000 miles) of the planet.
In this image from NASA's Voyager wide-angle image taken on Aug. 23 1989, the two main rings of Neptune can be clearly seen. In the lower part of the frame the originally announced ring arc, consisting of three distinct features, is visible.
This image of Miranda, obtained by NASA's Voyager 2 on approach in 1986, shows an unusual 'chevron' figure and regions of distinctly differing terrain on the Uranian moon.
These two images of Neptune were taken by NASA's Voyager 2's narrow angle camera when the spacecraft was about 12 million km (7.5 million miles) from Neptune.
This mosaic from NASA's Galileo Probe is of an equatorial "hotspot" on Jupiter and shows the features of a hazy cloud layer tens of kilometers above Jupiter's main visible cloud deck.
This image of Neptune's south polar region was obtained by NASA's Voyager on Aug. 23, 1989. The image shows the discovery of shadows in Neptune's atmosphere, shadows cast onto a deep cloud bank by small elevated clouds.
On Jan. 24, 1986, NASA's Voyager 2 obtained this color picture of the Uranian moon, Ariel. Most of the visible surface consists of relatively intensely cratered terrain transected by fault scarps and fault-bounded valleys (graben).
These two images of Uranus, one in true color and the other in false color, were compiled from images returned in 1986, by the narrow-angle camera of NASA's Voyager 2.
Jupiter, its Great Red Spot and three of its four largest satellites are visible in this photo taken Feb. 5, 1979, by Voyager 1. Io, Europa, and Callisto are seen against Jupiter's disk.
This image of Neptune was taken by NASA's Voyager 2's wide-angle camera; small trails of similar clouds trending east to west and large scale structure east of the Great Dark Spot all suggest that waves are present in the atmosphere and play a large role
This wide-angle image from NASA's Voyager 2, taken in 1989, was taken through the camera's clear filter, and was the first to show Neptune's rings in detail.
This natural color image of the limb of Triton was taken early in the morning of Aug. 25 1989, when the Voyager 2 spacecraft was at a distance of about 210,000 kilometers (128,000 miles) from the icy satellite.