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NASA's Mars Reconnaissance Orbiter shows Mars' northern-most sand dunes beginning to emerge from their winter cover of seasonal carbon dioxide (dry) ice. Dark, bare south-facing slopes are soaking up the warmth of the sun.
NASA's Mars Reconnaissance Orbiter shows Mars' northern-most sand dunes beginning to emerge from their winter cover of seasonal carbon dioxide (dry) ice. Dark, bare south-facing slopes are soaking up the warmth of the sun.

Sand Dunes in Spring

This color view of the parachute and back shell that helped deliver NASA's Curiosity rover to the surface of the Red Planet was taken by the High-HiRISE camera on NASA's Mars Reconnaissance Orbiter.
This color view of the parachute and back shell that helped deliver NASA's Curiosity rover to the surface of the Red Planet was taken by the High-HiRISE camera on NASA's Mars Reconnaissance Orbiter.

Relics of Rover's Landing

NASA's Mars Reconnaissance Orbiter captured this image on 27 June 2014, when Curiosity had just crossed the edge of the 3-sigma landing.
NASA's Mars Reconnaissance Orbiter captured this image on 27 June 2014, when Curiosity had just crossed the edge of the 3-sigma landing.

Curiosity Offside!

Towards the top of this image from NASA's 2001 Mars Odyssey spacecraft is a 'T' shaped depression and two sections of narrow channel located on the northeast part of the Elysium Mons volcanic complex. Fluids (like water, or lava) flow downhill.
Towards the top of this image from NASA's 2001 Mars Odyssey spacecraft is a 'T' shaped depression and two sections of narrow channel located on the northeast part of the Elysium Mons volcanic complex. Fluids (like water, or lava) flow downhill.

Which Came First?

NASA's Opportunity had driven 72.3 meters southward (237 feet) on June 10. Engineers drove the rover backward as a strategy to counteract an increase in the amount of current drawn by the drive motor of the right-front wheel. 3D glasses are necessary.
NASA's Opportunity had driven 72.3 meters southward (237 feet) on June 10. Engineers drove the rover backward as a strategy to counteract an increase in the amount of current drawn by the drive motor of the right-front wheel. 3D glasses are necessary.

Opportunity's View After 72-Meter Drive, Sol 1912 (Stereo)

The channel crossing this image from NASA's 2001 Mars Odyssey spacecraft is called Ma'adim Valles.
The channel crossing this image from NASA's 2001 Mars Odyssey spacecraft is called Ma'adim Valles.

Ma'adim Valles

This scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity catches 'Pillinger Point,' on the western rim of Endeavour Crater, in the foreground.
This scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity catches 'Pillinger Point,' on the western rim of Endeavour Crater, in the foreground.

'Pillinger Point' Overlooking Endeavour Crater on Mars

A graben is a downdropped block of material bounded on both sides by faults. The graben in this image from NASA's 2001 Mars Odyssey spacecraft follows the trend of the nearby Sirenum Fossae graben.
A graben is a downdropped block of material bounded on both sides by faults. The graben in this image from NASA's 2001 Mars Odyssey spacecraft follows the trend of the nearby Sirenum Fossae graben.

Graben

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter took two images of the larger of Mars' two moons, Phobos, within 10 minutes of each other on March 23, 2008. This is the first.
The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter took two images of the larger of Mars' two moons, Phobos, within 10 minutes of each other on March 23, 2008. This is the first.

Phobos from 6,800 Kilometers (Color)

This observation from NASA's Mars Reconnaissance Orbite shows a candidate 2018 European Space Agency ExoMars landing site in Hypanis Vallis.
This observation from NASA's Mars Reconnaissance Orbite shows a candidate 2018 European Space Agency ExoMars landing site in Hypanis Vallis.

Cloudy Skies over Hypanis Vallis

The objective of this observation from NASA's Mars Reconnaissance Orbiter is to examine a light-toned deposit in a region of what is called 'chaotic terrain.' Some shapes suggest erosion by a fluid moving north and south.
The objective of this observation from NASA's Mars Reconnaissance Orbiter is to examine a light-toned deposit in a region of what is called 'chaotic terrain.' Some shapes suggest erosion by a fluid moving north and south.

A Light Toned Deposit in Aureum Chaos

This false-color scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity catches 'Pillinger Point,' on the western rim of Endeavour Crater, in the foreground.
This false-color scene from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity catches 'Pillinger Point,' on the western rim of Endeavour Crater, in the foreground.

'Pillinger Point' Overlooking Endeavour Crater on Mars (False Color)

This image NASA's Mars Reconnaissance Orbiter shows dozens of dark-toned dunes in and around several craters within the rugged terrain of Terra Cimmeria.
This image NASA's Mars Reconnaissance Orbiter shows dozens of dark-toned dunes in and around several craters within the rugged terrain of Terra Cimmeria.

Sand Dune Catch and Release

This image taken by NASA's 2001 Mars Odyssey spacecraft shows a portion of Scamander Vallis. Dark slope streaks are also visible on the west-facing wall of the channel.
This image taken by NASA's 2001 Mars Odyssey spacecraft shows a portion of Scamander Vallis. Dark slope streaks are also visible on the west-facing wall of the channel.

Scamander Vallis

NASA's 2001 Mars Odyssey infrared image shows a group of dunes in Aonia Terra.
NASA's 2001 Mars Odyssey infrared image shows a group of dunes in Aonia Terra.

Aonia Terra Dunes (IR)

NASA's Opportunity had driven 62.5 meters (205 feet) that sol, southward away from an outcrop called 'Penrhyn,' which the rover had been examining for a few sols, and toward a crater called 'Adventure.' 3D glasses are necessary to view this image.
NASA's Opportunity had driven 62.5 meters (205 feet) that sol, southward away from an outcrop called 'Penrhyn,' which the rover had been examining for a few sols, and toward a crater called 'Adventure.' 3D glasses are necessary to view this image.

Opportunity's Surroundings After Backwards Drive, Sol 1850 (Stereo)

This 360-degree panorama shows the vista from the location where NASA's Mars Exploration Rover Spirit has spent its third Martian southern-hemisphere winter inside Mars' Gusev Crater. 3D glasses are necessary to view this image.
This 360-degree panorama shows the vista from the location where NASA's Mars Exploration Rover Spirit has spent its third Martian southern-hemisphere winter inside Mars' Gusev Crater. 3D glasses are necessary to view this image.

Full-Circle 'Bonestell' Panorama from Spirit (Stereo)

NASA's Earth-orbiting Hubble Space Telescope took the picture on June 26, 2001 when Mars was approximately 43 million miles (68 million km) from Earth -- the closest Mars has ever been to Earth since 1988.
NASA's Earth-orbiting Hubble Space Telescope took the picture on June 26, 2001 when Mars was approximately 43 million miles (68 million km) from Earth -- the closest Mars has ever been to Earth since 1988.

Mars at 43 Million Miles From Earth

NASA's Mars Pathfinder's forward rover ramp can be seen successfully unfurled in this image, taken in stereo by the Imager camera. 3-D glasses are necessary to identify surface detail.
NASA's Mars Pathfinder's forward rover ramp can be seen successfully unfurled in this image, taken in stereo by the Imager camera. 3-D glasses are necessary to identify surface detail.

Forward Ramp in 3-D

Oxia Planum is an ancient (Noachian epoch) terrain situated to the east of Chryse Planitia at about 18 degrees north. This image from NASA's Mars Reconnaissance Orbiteris of a proposed ExoMars Landing Site.
Oxia Planum is an ancient (Noachian epoch) terrain situated to the east of Chryse Planitia at about 18 degrees north. This image from NASA's Mars Reconnaissance Orbiteris of a proposed ExoMars Landing Site.

Clay-Rich Terrain in Oxia Planum: A Proposed ExoMars Landing Site

A delta is a pile of sediment dumped by a river where it enters a standing body of water. Evidence for deltas that formed billions of years ago on Mars has been mounting in recent years. This image is from NASA's Mars Reconnaissance Orbiter.
A delta is a pile of sediment dumped by a river where it enters a standing body of water. Evidence for deltas that formed billions of years ago on Mars has been mounting in recent years. This image is from NASA's Mars Reconnaissance Orbiter.

Searching for Clinoforms in a Possible Delta

The North Polar layered deposits (NPLD) are a stack of layers of ice and dust at the North Pole of Mars. The layers are thought to have been deposited over millions of years. This image is from NASA's Mars Reconnaissance Orbiter.
The North Polar layered deposits (NPLD) are a stack of layers of ice and dust at the North Pole of Mars. The layers are thought to have been deposited over millions of years. This image is from NASA's Mars Reconnaissance Orbiter.

Blockfall on the North Polar Layered Deposits

Why are these dunes different colors? Sand on Mars is typically dark in tone, as it commonly derived from volcanic rocks like lava flows as shown by NASA's Mars Reconnaissance Orbiter.
Why are these dunes different colors? Sand on Mars is typically dark in tone, as it commonly derived from volcanic rocks like lava flows as shown by NASA's Mars Reconnaissance Orbiter.

Two-Color Dunes in Meridiani Terra

NASA's Mars Reconnaissance Orbiter reveals that gullies, or ravines, are landforms commonly found in the mid-latitudes on Mars, particularly in the Southern highlands.
NASA's Mars Reconnaissance Orbiter reveals that gullies, or ravines, are landforms commonly found in the mid-latitudes on Mars, particularly in the Southern highlands.

A New Gully Channel in Terra Sirenum

Sandwiched between a crater nearly 4 kilometer across and a much larger and older crater over 15-kilometers in diameter is this small impact crater with light-toned material exposed in its ejecta. This image is from NASA's Mars Reconnaissance Orbiter.
Sandwiched between a crater nearly 4 kilometer across and a much larger and older crater over 15-kilometers in diameter is this small impact crater with light-toned material exposed in its ejecta. This image is from NASA's Mars Reconnaissance Orbiter.

Craters within Craters

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