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This graphic from NASA's Curiosity mission shows close-ups of light-toned veins in rocks in the 'Yellowknife Bay' area of Mars together with analyses of their composition.
This graphic from NASA's Curiosity mission shows close-ups of light-toned veins in rocks in the 'Yellowknife Bay' area of Mars together with analyses of their composition.

Calcium-Rich Veins in Martian Rocks

Dunes cover the floor of Bopolu Crater in Meridiani Planum in this image captured by NASA's 2001 Mars Odyssey spacecraft.
Dunes cover the floor of Bopolu Crater in Meridiani Planum in this image captured by NASA's 2001 Mars Odyssey spacecraft.

Bopolu Dunes

The layered ridge and mesas in this image from NASA's 2001 Mars Odyssey spacecraft are located on the northern margin of Hellas Basin.
The layered ridge and mesas in this image from NASA's 2001 Mars Odyssey spacecraft are located on the northern margin of Hellas Basin.

Layering

This image from NASA's 2001 Mars Odyssey spacecraft shows part of the northeastern flank of Elysium Mons.
This image from NASA's 2001 Mars Odyssey spacecraft shows part of the northeastern flank of Elysium Mons.

Elysium Mons

The depressions and offset ridge in this image captured by NASA's Mars Odyssey spacecraft are evidence of faulting in this region of Sinai Dorsa.
The depressions and offset ridge in this image captured by NASA's Mars Odyssey spacecraft are evidence of faulting in this region of Sinai Dorsa.

Faults

This image captured by NASA's 2001 Mars Odyssey spacecraft shows more of Olympia Undae, a large dune field located near the north polar cap.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows more of Olympia Undae, a large dune field located near the north polar cap.

More Polar Dunes

This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of the extensive lava flows that comprise Daedalia Planum.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of the extensive lava flows that comprise Daedalia Planum.

Daedalia Planum

This image from NASA's Mars Odyssey shows are region of lava covered plains east of Olympus Mons. Winds are common in the area and have created windstreaks downwind of craters in the region and on the lava flows.
This image from NASA's Mars Odyssey shows are region of lava covered plains east of Olympus Mons. Winds are common in the area and have created windstreaks downwind of craters in the region and on the lava flows.

Tharsis Lava

Dunes appear on the floor of Nili Patera, one of the two volcanic calderas of Syrtis Major in this image taken by NASA's 2001 Mars Odyssey.
Dunes appear on the floor of Nili Patera, one of the two volcanic calderas of Syrtis Major in this image taken by NASA's 2001 Mars Odyssey.

Nili Patera Dunes

Dark slope streaks, like the ones in this unnamed crater in Terra Sabaea, are believed to be formed when surface dust is displaced and the darker rock below is exposed. Rocks falling due to gravity likely formed these streaks.
Dark slope streaks, like the ones in this unnamed crater in Terra Sabaea, are believed to be formed when surface dust is displaced and the darker rock below is exposed. Rocks falling due to gravity likely formed these streaks.

Dark Slope Streak

As NASA's Mars rover Curiosity is progressing toward Mount Sharp, researchers are using the rover's RIM and ChemCam instruments to examine soils and rocks in Gale Crater.
As NASA's Mars rover Curiosity is progressing toward Mount Sharp, researchers are using the rover's RIM and ChemCam instruments to examine soils and rocks in Gale Crater.

Crystal-Laden Martian Rock Examined by Curiosity's Laser Instrument

This daytime IR image shows part of Nanedi Vallis as seen by NASA's 2001 Mars Odyssey spacecraft.
This daytime IR image shows part of Nanedi Vallis as seen by NASA's 2001 Mars Odyssey spacecraft.

Nanedi Valles

This image from NASA's 2001 Mars Odyssey spacecraft shows a very small portion of the lava flows that originated from Arsia Mons -- a pre-existing crater has been filled, with only small sections of its rim still visible above the level of the lava.
This image from NASA's 2001 Mars Odyssey spacecraft shows a very small portion of the lava flows that originated from Arsia Mons -- a pre-existing crater has been filled, with only small sections of its rim still visible above the level of the lava.

Arsia Mons Flows

This small group of dunes in located within Kasei Valles. This image from NASA's Mars Odyssey was captured on June 16, 2010.
This small group of dunes in located within Kasei Valles. This image from NASA's Mars Odyssey was captured on June 16, 2010.

Kasei Valles Dunes

At eastern end of Valles Marineris is Eos Chasma. In Eos, the canyon system transitions into a region of chaos and then into major outflow channels. This image from NASA's 2001 Mars Odyssey shows the transition into chaos.
At eastern end of Valles Marineris is Eos Chasma. In Eos, the canyon system transitions into a region of chaos and then into major outflow channels. This image from NASA's 2001 Mars Odyssey shows the transition into chaos.

Eos Chasma

This image captured by NASA's Mars Odyssey shows a portion of the dunes located in the floor of Kaiser Crater.
This image captured by NASA's Mars Odyssey shows a portion of the dunes located in the floor of Kaiser Crater.

Kaiser Crater Dunes

The fracture system in this image, captured by NASA's 2001 Mars Odyssey, is part of Galaxias Fossae, a series of fractures on the northern part of the Elysium Mons volcanic complex.
The fracture system in this image, captured by NASA's 2001 Mars Odyssey, is part of Galaxias Fossae, a series of fractures on the northern part of the Elysium Mons volcanic complex.

Galaxias Fossae

The channels in this image from NASA's 2001 Mars Odyssey spacecraft are draining a highstanding region north of Hellas Planum.
The channels in this image from NASA's 2001 Mars Odyssey spacecraft are draining a highstanding region north of Hellas Planum.

Channels

The surface beneath the south polar cap as seen by NASA's 2001 Mars Odyssey spacecraft at the highest latitude in Chasma Australe.
The surface beneath the south polar cap as seen by NASA's 2001 Mars Odyssey spacecraft at the highest latitude in Chasma Australe.

Chasma Australe

This image from NASA's 2001 Mars Odyssey shows a small portion of the complex channel system, Kasei Valles. In this image, secondary channeling has cut down deeper into the main channel.
This image from NASA's 2001 Mars Odyssey shows a small portion of the complex channel system, Kasei Valles. In this image, secondary channeling has cut down deeper into the main channel.

Kasei Valles

The channels and depressions seen in this image from NASA's 2001 Mars Odyssey spacecraft are part of Gordii Fossae, located on the volcanic plains between Olympus Mons and Gigas Sulci.
The channels and depressions seen in this image from NASA's 2001 Mars Odyssey spacecraft are part of Gordii Fossae, located on the volcanic plains between Olympus Mons and Gigas Sulci.

Gordii Fossae

This triangle plot shows the relative concentrations of some of the major chemical elements in the Martian rock
This triangle plot shows the relative concentrations of some of the major chemical elements in the Martian rock

Chemistry of Martian Rock 'Esperance'

The dunes in this daytime IR image from NASA's 2001 Mars Odyssey spacecraft appear bright because they are warmer than the surrounding crater materials. These dunes are located on the floor of Proctor Crater.
The dunes in this daytime IR image from NASA's 2001 Mars Odyssey spacecraft appear bright because they are warmer than the surrounding crater materials. These dunes are located on the floor of Proctor Crater.

Proctor Crater Dunes

The small channel in this image from NASA's 2001 Mars Odyssey spacecraft runs semi-parallel to Shalbatana Vallis in Xanthe Terra.
The small channel in this image from NASA's 2001 Mars Odyssey spacecraft runs semi-parallel to Shalbatana Vallis in Xanthe Terra.

Channel

The volcanic flows that comprise Daedalia Planum arose from Arsia Mons. This image from NASA's 2001 Mars Odyssey spacecraft shows a small portion of Daedalia Planum, including a channel-fed lava flow.
The volcanic flows that comprise Daedalia Planum arose from Arsia Mons. This image from NASA's 2001 Mars Odyssey spacecraft shows a small portion of Daedalia Planum, including a channel-fed lava flow.

Daedalia Planum

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