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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.
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.

Global Color Mosaic of Triton

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.
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.

Triton High Resolution View of Northern Hemisphere

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.
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.

Color Sequence of Triton Approach Images

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.
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.

Neptune's Dark Spot (D2) at High Resolution

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.
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.

Neptune - Two Images

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.
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.

Neptune and Triton

This photograph of Neptune was reconstructed from two images taken by NASA's Voyager 2. At the north (top) is the Great Dark Spot.
This photograph of Neptune was reconstructed from two images taken by NASA's Voyager 2. At the north (top) is the Great Dark Spot.

Neptune - Great Dark Spot, Scooter, Dark Spot 2

This contrast enhanced color picture of Neptune was acquired by NASA's Voyager 2 on Aug. 14, 1989. As Voyager 2 approached Neptune, rapidly increasing image resolution is revealed striking new details. Bright, wispy clouds are seen overlying the Great Dar
This contrast enhanced color picture of Neptune was acquired by NASA's Voyager 2 on Aug. 14, 1989. As Voyager 2 approached Neptune, rapidly increasing image resolution is revealed striking new details. Bright, wispy clouds are seen overlying the Great Dar

Neptune

This photograph of Neptune shows three of the features that NASA's Voyager 2 has photographed. At the north is the Great Dark Spot, accompanied by bright, white clouds that undergo rapid changes in appearance.
This photograph of Neptune shows three of the features that NASA's Voyager 2 has photographed. At the north is the Great Dark Spot, accompanied by bright, white clouds that undergo rapid changes in appearance.

Neptune

During August 16 and 17, 1989, the Voyager 2 narrow-angle camera was used to photograph Neptune almost continuously, recording approximately two and one-half rotations of the planet..
During August 16 and 17, 1989, the Voyager 2 narrow-angle camera was used to photograph Neptune almost continuously, recording approximately two and one-half rotations of the planet..

Neptune Full Disk

NASA's Voyager 2's post-encounter view of Neptune's south pole as the spacecraft sped away on a southward trajectory.
NASA's Voyager 2's post-encounter view of Neptune's south pole as the spacecraft sped away on a southward trajectory.

Post-encounter View of Neptune's South Pole

This color photo of Neptune's large satellite Triton was obtained on Aug. 24 1989. In reality, there is no part of Triton that would appear blue to the eye. The bright southern hemisphere of Triton, which fills most of this frame, is generally pink.
This color photo of Neptune's large satellite Triton was obtained on Aug. 24 1989. In reality, there is no part of Triton that would appear blue to the eye. The bright southern hemisphere of Triton, which fills most of this frame, is generally pink.

Detail of Triton's Surface

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 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

Neptune - True Color of Clouds

This dramatic view of the crescents of Neptune and Triton was acquired by Voyager 2 approximately 3 days, 6 and one-half hours after its closest approach to Neptune (north is to the right).
This dramatic view of the crescents of Neptune and Triton was acquired by Voyager 2 approximately 3 days, 6 and one-half hours after its closest approach to Neptune (north is to the right).

Crescents of Neptune and Triton

This computer generated montage created from images obtained by NASA's Voyager 2 shows Neptune as it would appear from a spacecraft approaching Triton, Neptune's largest moon at 2706 km (1683 mi) in diameter.
This computer generated montage created from images obtained by NASA's Voyager 2 shows Neptune as it would appear from a spacecraft approaching Triton, Neptune's largest moon at 2706 km (1683 mi) in diameter.

Montage of Neptune and Triton

This clear filter image was acquired by NASA's Voyager 2 on Aug. 14, 1989. The image shows a dark feature extending westward (left) and northward (up) toward the equator from the Great Dark Spot (GDS).
This clear filter image was acquired by NASA's Voyager 2 on Aug. 14, 1989. The image shows a dark feature extending westward (left) and northward (up) toward the equator from the Great Dark Spot (GDS).

Neptune - Dark Feature

NASA's Voyager 2 took this picture of Neptune's largest satellite,Triton, from less than 80,000 km (50,000 miles). The image shows an area in Triton's northern hemisphere. The Sun is just above the horizon, so features cast shadows that accentuate height
NASA's Voyager 2 took this picture of Neptune's largest satellite,Triton, from less than 80,000 km (50,000 miles). The image shows an area in Triton's northern hemisphere. The Sun is just above the horizon, so features cast shadows that accentuate height

Triton

The image of Neptune shows the Great Dark Spot and its companion bright smudge; on the west limb the fast moving bright feature called Scooter and the little dark spot are visible in this image obtaind by NASA
The image of Neptune shows the Great Dark Spot and its companion bright smudge; on the west limb the fast moving bright feature called Scooter and the little dark spot are visible in this image obtaind by NASA

Neptune Full Disk View

Part of the complex geologic history of icy Triton, Neptune's largest satellite, is shown in this NASA Voyager 2 photo. The photo was received as part of a Triton-mapping sequence in 1989.
Part of the complex geologic history of icy Triton, Neptune's largest satellite, is shown in this NASA Voyager 2 photo. The photo was received as part of a Triton-mapping sequence in 1989.

Complex Geologic History of Triton

This polar projection from NASA's Voyager 2 of Triton's southern hemisphere provides a view of the southern polar cap and bright equatorial fringe. The margin of the cap is scalloped, bright fringe probably consists of very fresh nitrogen frost or snow.
This polar projection from NASA's Voyager 2 of Triton's southern hemisphere provides a view of the southern polar cap and bright equatorial fringe. The margin of the cap is scalloped, bright fringe probably consists of very fresh nitrogen frost or snow.

Triton's Southern Hemisphere

This composite view from NASA's Voyager 2 shows Neptune on Triton's horizon. The foreground in this computer generated view of Triton's maria as they would appear from a point approximately 45 km above the surface.
This composite view from NASA's Voyager 2 shows Neptune on Triton's horizon. The foreground in this computer generated view of Triton's maria as they would appear from a point approximately 45 km above the surface.

Neptune on Triton's Horizon

This bulls-eye view of Neptune's small dark spot (D2) was obtained by NASA's Voyager 2's narrow-angle camera. Banding surrounding the feature indicates unseen strong winds.
This bulls-eye view of Neptune's small dark spot (D2) was obtained by NASA's Voyager 2's narrow-angle camera. Banding surrounding the feature indicates unseen strong winds.

Neptune's Small Dark Spot (D2)

NASA's Voyager 2 obtained this parting shot of Triton, Neptune's largest satellite, shortly after closest approach to the moon and passage through its shadow on the morning of Aug. 25, 1989.
NASA's Voyager 2 obtained this parting shot of Triton, Neptune's largest satellite, shortly after closest approach to the moon and passage through its shadow on the morning of Aug. 25, 1989.

Voyager's Parting Shot of Triton

This photograph of Neptune was reconstructed from two images taken by NASA's Voyager 2. At the north (top) is the Great Dark Spot, accompanied by bright, white clouds that undergo rapid changes in appearance.
This photograph of Neptune was reconstructed from two images taken by NASA's Voyager 2. At the north (top) is the Great Dark Spot, accompanied by bright, white clouds that undergo rapid changes in appearance.

Neptune Scooter

This photograph of Neptune's southern hemisphere was taken by the narrow-angle camera on NASA's Voyager 2 when the spacecraft was 4.2 million km (2.6 million miles) from the planet.
This photograph of Neptune's southern hemisphere was taken by the narrow-angle camera on NASA's Voyager 2 when the spacecraft was 4.2 million km (2.6 million miles) from the planet.

Neptune's Southern Hemisphere

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