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This view of the two moons of Mars comes from a set of images taken by NASA's Mars rover Curiosity as the larger moon, Phobos, passed in front of the smaller one, Deimos, from Curiosity's perspective, on Aug. 1, 2013.
This view of the two moons of Mars comes from a set of images taken by NASA's Mars rover Curiosity as the larger moon, Phobos, passed in front of the smaller one, Deimos, from Curiosity's perspective, on Aug. 1, 2013.

Two Moons of Mars in One Enhanced View

As on the Earth, many processes can move material down a Martian slope. This graphic compares seven different types of features observed on Mars that appear to result from material flowing or sliding or rolling down slopes.
As on the Earth, many processes can move material down a Martian slope. This graphic compares seven different types of features observed on Mars that appear to result from material flowing or sliding or rolling down slopes.

Martian Features Formed When Material Moves Downslope

This figure shows the location of CHIMRA on the turret of NASA's Curiosity rover, together with a cutaway view of the device. CHIMRA processes samples from the rover's scoop or drill and delivers them to science instruments.
This figure shows the location of CHIMRA on the turret of NASA's Curiosity rover, together with a cutaway view of the device. CHIMRA processes samples from the rover's scoop or drill and delivers them to science instruments.

Preparing Samples on Mars

This image from NASA's 2001 Mars Odyssey spacecraft shows a young crater. Dark radial spokes are created by the explosive blast of an impact event. With time, only thick ejecta near the rim of the crater will be visible, and dark spokes will disappear.
This image from NASA's 2001 Mars Odyssey spacecraft shows a young crater. Dark radial spokes are created by the explosive blast of an impact event. With time, only thick ejecta near the rim of the crater will be visible, and dark spokes will disappear.

Young Crater

This cropped image from NASA's Curiosity rover shows one set of marks on the surface of Mars where blasts from the descent-stage rocket engines blew away some of the surface material.
This cropped image from NASA's Curiosity rover shows one set of marks on the surface of Mars where blasts from the descent-stage rocket engines blew away some of the surface material.

Goulburn Scour Mark

This image from NASA's 2001 Mars Odyssey spacecraft of the Tharsis region illustrates relative age relations. Fractures occurred in old lava flows and then younger lava flows covered the fractures.
This image from NASA's 2001 Mars Odyssey spacecraft of the Tharsis region illustrates relative age relations. Fractures occurred in old lava flows and then younger lava flows covered the fractures.

Tharsis Volcanics

A complexly fractured region, called Lycus Sulci, is found on the western side of Olympus Mons. This image captured by NASA's 2001 Mars Odyssey spacecraft in located in part of Lycus Sulci.
A complexly fractured region, called Lycus Sulci, is found on the western side of Olympus Mons. This image captured by NASA's 2001 Mars Odyssey spacecraft in located in part of Lycus Sulci.

Lycus Sulci

The hills and mesas in this image seen by NASA's 2001 Mars Odyssey spacecraft are part of Echus Chaos.
The hills and mesas in this image seen by NASA's 2001 Mars Odyssey spacecraft are part of Echus Chaos.

Echus Chaos

This image is the first high-resolution color mosaic from NASA's Curiosity rover, showing the geological environment around the rover's landing site in Gale Crater on Mars.
This image is the first high-resolution color mosaic from NASA's Curiosity rover, showing the geological environment around the rover's landing site in Gale Crater on Mars.

First High-Resolution Color Mosaic of Curiosity's Mastcam Images

This image from NASA's 2001 Mars Odyssey spacecraft shows two craters located in the northern lowlands.
This image from NASA's 2001 Mars Odyssey spacecraft shows two craters located in the northern lowlands.

Craters

This image from NASA's Mars Reconnaissance Orbiter shows an arcuate ridge in Terra Meridiani.The ridge is most likely a former streambed, now exposed in inverted relief.
This image from NASA's Mars Reconnaissance Orbiter shows an arcuate ridge in Terra Meridiani.The ridge is most likely a former streambed, now exposed in inverted relief.

Curvilinear Ridge in Terra Meridiani

This image from the panoramic camera on NASA's Mars Exploration Rover Opportunity shows a rock called 'Chocolate Hills,' which the rover found and examined at the edge of a young crater called 'Concepción.'
This image from the panoramic camera on NASA's Mars Exploration Rover Opportunity shows a rock called 'Chocolate Hills,' which the rover found and examined at the edge of a young crater called 'Concepción.'

Rock with Odd Coating Beside a Young Martian Crater

This image captured by NASA's 2001 Mars Odyssey spacecraft shows the part of the floor of Melas Chasma. Melas Chasma in the central chasma of Valles Marineris.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows the part of the floor of Melas Chasma. Melas Chasma in the central chasma of Valles Marineris.

Melas Chasma

This composite image, from NASA's Galileo and Mars Global Survey orbiters, of Earth and Mars was created to allow viewers to gain a better understanding of the relative sizes of the two planets.
This composite image, from NASA's Galileo and Mars Global Survey orbiters, of Earth and Mars was created to allow viewers to gain a better understanding of the relative sizes of the two planets.

Earth Mars Comparison

This image from the navigation camera on the mast of NASA's Mars Exploration Rover Opportunity shows streaks of dust or sand on the vehicle's rear solar panel after a series of drives during which the rover was pointed steeply uphill.
This image from the navigation camera on the mast of NASA's Mars Exploration Rover Opportunity shows streaks of dust or sand on the vehicle's rear solar panel after a series of drives during which the rover was pointed steeply uphill.

Streaks on Opportunity Solar Panel After Uphill Drive

The image is an excerpt from an observation from NASA's Mars Reconnaissance Orbiter showing a meteorite impact that excavated this crater on Mars exposed bright ice that had been hidden just beneath the surface at this location.
The image is an excerpt from an observation from NASA's Mars Reconnaissance Orbiter showing a meteorite impact that excavated this crater on Mars exposed bright ice that had been hidden just beneath the surface at this location.

Fresh Crater Exposing Buried Ice on Mid-Latitude Mars

This set of images compares rocks seen by NASA's Opportunity rover and Curiosity rover at two different parts of Mars.
This set of images compares rocks seen by NASA's Opportunity rover and Curiosity rover at two different parts of Mars.

Two Different Aqueous Environments

The lava channels in this image from NASA's 2001 Mars Odyssey spacecraft are located on the southern flank of Ascraeus Mons.
The lava channels in this image from NASA's 2001 Mars Odyssey spacecraft are located on the southern flank of Ascraeus Mons.

Lava Channels

This global map of Mars was acquired on Aug. 4, 2012, by the Mars Color Imager instrument on NASA's Mars Reconnaissance Orbiter to forecast weather conditions for the entry, descent and landing of NASA's Curiosity rover.
This global map of Mars was acquired on Aug. 4, 2012, by the Mars Color Imager instrument on NASA's Mars Reconnaissance Orbiter to forecast weather conditions for the entry, descent and landing of NASA's Curiosity rover.

Mars Weather Map, Aug. 4, 2012

This image from NASA's Mars Reconnaissance Orbiter covers a small portion of the northwest quadrant of Hellas Basin, or Hellas Planitia, on southern Mars; Hellas is one of the largest impact craters in the solar system.
This image from NASA's Mars Reconnaissance Orbiter covers a small portion of the northwest quadrant of Hellas Basin, or Hellas Planitia, on southern Mars; Hellas is one of the largest impact craters in the solar system.

Intra-Crater Structure in NW Hellas Basin, Mars

The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of Syrtis Major Planum.
The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of Syrtis Major Planum.

Syrtis Major Planum - False Color

This image from NASA's 2001 Mars Odyssey spacecraft is located on the margin of Tempe Terra near Chryse Planitia. Several channels are visible as well as tectonic features.
This image from NASA's 2001 Mars Odyssey spacecraft is located on the margin of Tempe Terra near Chryse Planitia. Several channels are visible as well as tectonic features.

Tempe Terra

Ophir Chasma forms the northern portion of Valles Marineris, and this image from NASA's Mars Reconnaissance Orbiter spacecraft features a small part of its wall and floor.
Ophir Chasma forms the northern portion of Valles Marineris, and this image from NASA's Mars Reconnaissance Orbiter spacecraft features a small part of its wall and floor.

Layers and Fractures in Ophir Chasma

The THEMIS VIS camera contains 5 filters. Data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows an unnamed crater on the floor of Molesworth Carter.
The THEMIS VIS camera contains 5 filters. Data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows an unnamed crater on the floor of Molesworth Carter.

Crater Dunes - False Color

The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This false color image from NASA's 2001 Mars Odyssey spacecraft shows windstreaks on the floor of Gusev Crater.
The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This false color image from NASA's 2001 Mars Odyssey spacecraft shows windstreaks on the floor of Gusev Crater.

Gusev Crater - False Color

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