Artist concept of Mars Reconnaissance Orbiter

This picture of a heart-shaped feature in Arabia Terra on Mars was taken on May 23, 2010, by the Context Camera (CTX) on NASA's Mars Reconnaissance Orbiter.

This image is an artist's concept of a view looking down on NASA's Mars Reconnaissance Orbiter. The spacecraft is pictured using its Shallow Subsurface Radar instrument (SHARAD) to "look" under the...

This HiRISE image shows a crater approximately 11 km (7 miles) in diameter, located in Acidalia Planitia, part of the Northern Plains. Several features in and around this crater are suggestive of f...

This annotated image from NASA's Mars Reconnaissance Orbiter shows a bright feature interpreted as the United Kingdom's Beagle 2 Lander, which was never heard from after its expected Dec. 25, 2003,...

The MRO Context Camera, CTX, at Malin Space Science Systems in 2004, before it was delivered and mounted on the spacecraft.

This sequence of images shows a blast zone where the sky crane from NASA's Curiosity rover mission hit the ground after setting the rover down in August 2012, and how that dark scar's appearance ch...

The bright landing platform left behind by NASA's Mars Exploration Rover Opportunity in 2004 is visible inside Eagle Crater, where "Opportunity Lander" is indicated in this annotated, April 8, 2...

This pit crater was created by an empty lava tube in Mars’ Arsia Mons region. The image was captured by NASA’s Mars Reconnaissance Orbiter on Aug. 16, 2020.

The total distance driven by NASA's Mars rover Curiosity passed the one-mile mark a few days before the first anniversary of the rover's landing on Mars.

By analyzing radar images like the one at top of this montage, scientists discovered evidence for a past ice age in the northern polar ice cap of Mars.

This image shows blocks of bright, layered rock embedded in darker material that are thought to have been deposited by a giant flood that occurred when Uzboi Valles breached the rim of Holden Crater.

NASA's Mars Reconnaissance Orbiter observes many slopes in the middle latitudes of Mars showing icy flows or glaciers. The region shown here, in the south-facing slope of a crater, is unusual becau...

This image shows spidery channels eroded into Martian ground. It is a Sept. 12, 2016, example from HiRISE camera high-resolution observations of more than 20 places that were chosen in 2016 on the ...

This animation demonstrates the salty ponds and streams that scientists think may have been left behind as Gale Crater dried out over time. The bottom of the image is the floor of Gale Crater, with...

This image, taken with the High Resolution Imaging Science Experiment (HiRISE) camera, shows the transition between the "Murray Formation," in which layers are poorly expressed and difficult to tra...

Boulder-size blocks of water ice can be seen around the rim of an impact crater on Mars, as viewed by the High-Resolution Imaging Science Experiment (HiRISE camera) aboard NASA’s Mars Reconnaissanc...

This HiRISE image shows a portion of interior layered deposits (ILD) in Juventae Chasma. Juventae Chasma is a large depression near the equatorial canyon system Valles Marineris.

These long, smooth features are sand ridges shaped by the constant martian wind. They run perpendicular, or at right angles to, the direction of the wind and often found in channels and crater inte...

Terrain in Vastitas Borealis Region.

The arm and the remote sensing mast of the Mars rover Curiosity each carry science instruments and other tools for NASA's Mars Science Laboratory mission.

This image acquired on March 29, 2011 by NASAs Mars Reconnaissance Orbiter, shows dunes with ripples on their upwind slopes and dark streaks on their downwind slopes.

This map shows the route driven by NASA's Mars rover Curiosity through the 43rd Martian day, or sol, of the rover's mission on Mars (Sept. 19, 2012).

This inner slope of a Martian crater has several of the seasonal dark streaks called "recurrent slope lineae," or RSL, that a November 2017 report interprets as granular flows, rather than darkenin...

From a distance, the floor of this crater looks like a giant honeycomb or spider web. The intersecting shapes, or polygons, commonly occur in the northern lowlands of Mars.

This set of images shows "before" and "after" images of NASA's Phoenix Mars Lander taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.