Artist concept of Mars Reconnaissance Orbiter

This map shows the frequency of carbon dioxide frost's presence at sunrise on Mars, as a percentage of days year-round. Carbon dioxide ice more often covers the ground at night in some mid-latitude...

Mawrth Vallis is one of the oldest valleys on Mars, formed in and subsequently covered by layered rocks, which are now exposed due to erosion. Mars orbiters have observed clay minerals that form in...

This unnamed impact crater is about 8 kilometers in diameter and contains numerous gullies.

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter captured winter images of NASA's Phoenix Mars Lander surrounded by dry-ice frost on Mars.

This map shows the thickness of the north polar layered deposits on Mars as measured by the Shallow Radar instrument on NASA's Mars Reconnaissance Orbiter.

Mars Reconnaissance Orbiter is Off to Mars!

NASA's Mars Reconnaissance Orbiter has revealed Martian rocks containing a hydrated mineral similar to opal. The rocks are light-toned and appear cream-colored in this false-color image taken by th...

The insert in this image is a simulation of what the Mars Reconnaissance Orbiter's optical navigation camera images of the Martian moons Phobos and Deimos will look like.

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.

Back-and-forth blinking of this two-image animation shows movement of ripples covering a sand dune on Mars.

This image shows the landing site of NASA's Curiosity rover and destinations scientists want to investigate.

The white speck is NASA’s Perseverance rover in the “South Séítah” area of Mars’ Jezero Crater.

This April 6, 2014, image from the Context Camera on NASA's Mars Reconnaissance Orbiter was taken as a follow-up to discovery of a possible 2012 impact scar in images from the orbiter's Mars Color ...

This image acquired on January 27, 2019 by NASAs Mars Reconnaissance Orbiter, shows the extensive central peak complex of Hale Crater.

This image acquired on January 20, 2019 by NASAs Mars Reconnaissance Orbiter, shows a chaotic jumble of bright layered sediments, perhaps resulting from large landslides.

The two largest quakes detected by NASA's InSight appear to have originated in a region of Mars called Cerberus Fossae.

This image is located within Northern Sinus Meridiani, a region of ridged terrains and extensive stratigraphic layering. 

This 3D, or stereo anaglyph, view shows NASA's Mars rover Curiosity where it landed on Mars within Gale Crater, at a site now called Bradbury Landing. The view was produced from images taken by the...

Dry ice causes "Swiss Cheese" terrain on Mars.

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 ...

Two dark, rimless pits are located to the northwest of Ascraeus Mons in the Tharsis volcanic region of Mars.

NASA's Opportunity rover appears as a blip in the center of this square. This image taken by HiRISE, a high-resolution camera onboard NASA's Mars Reconnaissance Orbiter, shows the dust storm over P...

The new global mosaic, shown in a detail example at left, is stitched together from images taken by MRO’s Context Camera, which captures the Martian surface in long strips. The process is revealed ...

A rippled dune front in Herschel Crater on Mars moved an average of about two meters (about two yards) between March 3, 2007 and December 1, 2010, as seen in these images from NASA's Mars Reconnais...

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).