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This image, acquired by NASA's Mars Reconnaissance Orbiter, shows the rover Opportunity perched on the edge of 'Concepción' crater, a fresh crater with dark rays that clearly overprint the north-trending, wind-shaped ripples, in Meridiani Planum.
This image, acquired by NASA's Mars Reconnaissance Orbiter, shows the rover Opportunity perched on the edge of 'Concepción' crater, a fresh crater with dark rays that clearly overprint the north-trending, wind-shaped ripples, in Meridiani Planum.

Opportunity at 'Concepción' Crater, Seen from Orbit

This graph based on data from the RAD instrument onboard NASA's Mars Science Laboratory spacecraft shows the flux of energetic particles (vertical axis) as a function of the estimated energy deposited in water (horizontal axis).
This graph based on data from the RAD instrument onboard NASA's Mars Science Laboratory spacecraft shows the flux of energetic particles (vertical axis) as a function of the estimated energy deposited in water (horizontal axis).

Calculating Radiation Dose for Biological Tissue

The north/south trending parallel hills and valleys in this image captured by NASA's 2001 Mars Odyssey spacecraft were created by wind erosion and are called yardangs. These yardangs are located in Zephyria Planum.
The north/south trending parallel hills and valleys in this image captured by NASA's 2001 Mars Odyssey spacecraft were created by wind erosion and are called yardangs. These yardangs are located in Zephyria Planum.

Yardangs

This map shows where NASA's Mars rover Curiosity landed in August 2012 at 'Bradbury Landing.' All of these features are inside Gale Crater. Curiosity's next major destination, the entry point to the base of Mount Sharp.
This map shows where NASA's Mars rover Curiosity landed in August 2012 at 'Bradbury Landing.' All of these features are inside Gale Crater. Curiosity's next major destination, the entry point to the base of Mount Sharp.

From 'Glenelg' to Mount Sharp

The sand dunes in this image from NASA's 2001 Mars Odyssey spacecraft are located on the floor of Hargraves Crater.
The sand dunes in this image from NASA's 2001 Mars Odyssey spacecraft are located on the floor of Hargraves Crater.

Hargraves Crater Dunes

This image from NASA's 2001 Mars Odyssey spacecraft is of Apollineris Mons, which shows erosion of the materials on it's southern flank.
This image from NASA's 2001 Mars Odyssey spacecraft is of Apollineris Mons, which shows erosion of the materials on it's southern flank.

Apollinaris Mons

This image captured by NASA's 2001 Mars Odyssey spacecraft shows an unnamed channel located on the northwest margin of Arabia Terra.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows an unnamed channel located on the northwest margin of Arabia Terra.

Channel

Dark slope streaks mark many of the hills in this image captured by NASA's 2001 Mars Odyssey spacecraft. This region of hills is called Tartarus Colles. The term colles means small hills or knobs.
Dark slope streaks mark many of the hills in this image captured by NASA's 2001 Mars Odyssey spacecraft. This region of hills is called Tartarus Colles. The term colles means small hills or knobs.

Tartarus Colles

The surface textures located southeast of Aeolis Planum likely had wind action as one of the contributing processes, as shown by NASA's 2001 Mars Odyssey spacecraft.
The surface textures located southeast of Aeolis Planum likely had wind action as one of the contributing processes, as shown by NASA's 2001 Mars Odyssey spacecraft.

Surface Textures

The ridges and mesas in this image captured by NASA's 2001 Mars Odyssey spacecraft are part of Hydraotes Chaos.
The ridges and mesas in this image captured by NASA's 2001 Mars Odyssey spacecraft are part of Hydraotes Chaos.

Hydraotes Chaos

At the eastern end of Valles Marineris the chasma floors are typically filled with the hills and mounds of chaos terrain as seen by NASA's Mars Odyssey.
At the eastern end of Valles Marineris the chasma floors are typically filled with the hills and mounds of chaos terrain as seen by NASA's Mars Odyssey.

Eos Chasma

This image captured by NASA's 2001 Mars Odyssey spacecraft spans from Tithonium Chasma (top of image) to Ius Chasma (bottom of image).
This image captured by NASA's 2001 Mars Odyssey spacecraft spans from Tithonium Chasma (top of image) to Ius Chasma (bottom of image).

Valles Marineris

This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of Melas Chasma.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of Melas Chasma.

Melas Chasma

This cross-section graphic provides an interpretation of the geologic relationship between the 'Murray Formation,' the crater floor sediments, and the hematite ridge.
This cross-section graphic provides an interpretation of the geologic relationship between the 'Murray Formation,' the crater floor sediments, and the hematite ridge.

Geologic Cross-Section

The channel feature in this image from NASA's 2001 Mars Odyssey spacecraft is a huge gully that empties into Echus Chasma.
The channel feature in this image from NASA's 2001 Mars Odyssey spacecraft is a huge gully that empties into Echus Chasma.

Mega Gully

This image from NASA's Mars Odyssey is of the south polar surface. These pits appear to coalesce and reveal the surface below.
This image from NASA's Mars Odyssey is of the south polar surface. These pits appear to coalesce and reveal the surface below.

South Polar Surface

Located on the margin of Zephyria Planum, this image from NASA's 2001 Mars Odyssey shows the effect the wind has had on the surface of Mars. Loose materials have been removed and semi-consolidated materials have been eroded into narrow hill forms.
Located on the margin of Zephyria Planum, this image from NASA's 2001 Mars Odyssey shows the effect the wind has had on the surface of Mars. Loose materials have been removed and semi-consolidated materials have been eroded into narrow hill forms.

Wind Effects

This region of linear, intersecting ridges near the south pole is called Angustus Labyrinthus, as shown in this image captured by NASA's 2001 Mars Odyssey spacecraft.
This region of linear, intersecting ridges near the south pole is called Angustus Labyrinthus, as shown in this image captured by NASA's 2001 Mars Odyssey spacecraft.

Angustus Labyrinthus

This image NASA's Mars Reconnaissance Orbitershows a prominently stratified transect through the rock of a mountain of material in the middle of Hebes Chasma.
This image NASA's Mars Reconnaissance Orbitershows a prominently stratified transect through the rock of a mountain of material in the middle of Hebes Chasma.

A Revealing Landslide in Hebes Chasma

This image from NASA's 2001 Mars Odyssey spacecraft shows several channels dissecting the rim of Semeykin Crater.
This image from NASA's 2001 Mars Odyssey spacecraft shows several channels dissecting the rim of Semeykin Crater.

Semeykin Crater

The windstreaks in this image from NASA's 2001 Mars Odyssey spacecraft are located on the volcanic plains of Daedalia Planum.
The windstreaks in this image from NASA's 2001 Mars Odyssey spacecraft are located on the volcanic plains of Daedalia Planum.

Windstreaks

This image captured by NASA's 2001 Mars Odyssey spacecraft is of an unnamed channel located on the northern margin of Terra Cimmeria.
This image captured by NASA's 2001 Mars Odyssey spacecraft is of an unnamed channel located on the northern margin of Terra Cimmeria.

Channel

The sand dunes in this image from NASA's Mars Odyssey are located on the floor of Russell Crater.
The sand dunes in this image from NASA's Mars Odyssey are located on the floor of Russell Crater.

Russell Crater Dunes

Maumee Valles is the main channel visible in this image captured by NASA's Mars Odyssey.
Maumee Valles is the main channel visible in this image captured by NASA's Mars Odyssey.

Maumee Valles

On this map of Mars, spectrometers on spacecraft orbiting Mars have detected clay minerals (green) and hydrated minerals -- clays, sulfates and others (blue).
On this map of Mars, spectrometers on spacecraft orbiting Mars have detected clay minerals (green) and hydrated minerals -- clays, sulfates and others (blue).

Regions of Mars with Clays and Hydrated Minerals Identified from Orbit

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