A bright ice cap of frozen water covers the North Pole of Mars as seen by NASA's Mars Reconnaissance Orbiter. In winter, thin coverings of carbon dioxide and water frost covers this area and frosts finally disappear at end of the Martian spring season.
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.
Opportunity Rover on 'Murray Ridge' Seen From Orbit
NASA's Mars Reconnaissance Orbiter caught this view of NASA's Mars Exploration Rover Opportunity on Feb. 14, 2014. The red arrow points to Opportunity at the center of the image. Blue arrows point to tracks left by the rover in October 2013.
NASA's Mars Reconnaissance Orbiter saw the saddle between two valleys named Dingo Gap-in Gale Crater-where the rover Curiosity just traversed. The gap is spanned by a single dune visible both from the ground and from orbit.
One of the great strengths of the HiRISE camera onboard NASA's Mars Reconnaissance Orbiter is that its high resolution can help resolve interesting questions. Here, is the platy flow material younger than the yardang-forming material?
Color-Coded Clues to Composition Superimposed on Martian Seasonal-Flow Image
This image from NASA's Mar Reconnaissance Orbiter combines a photograph of seasonal dark flows on a Martian slope at Palikir Crater with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area.
Dark, seasonal flows emanate from bedrock exposures at Palikir Crater on Mars in this image from the HiRISE camera on NASA's Mars Reconnaissance Orbiter. These dark, warm-season flows are called 'recurring slope lineae' or RSL.
In an area like Russell Crater, very ancient impact crater, NASA's Mars Reconnaissance Orbiter can follow changes in the terrain by comparing images taken at different times. Frost (carbon dioxide ice) is seen in this image.
Traverse Map for Mars Rover Curiosity as of Jan. 26, 2014
This map shows the route that NASA's Curiosity Mars rover drove inside Gale Crater from its landing in August 2013 through Jan. 26, 2004. The rover is approaching a gap between two low scarps, 'Dingo Gap.'
The gold line on this image shows NASA's Opportunity's route from the landing site, in upper left, to the area it is investigating on the western rim of Endeavour Crater as of the rover's 10th anniversary on Mars, in Earth years.
Fissure near Cerberus Fossae with Tectonic Morphologies
The linearity of the volcanic vent shown in this image observed by NASA's Mars Reconnaissance Orbiter, in conjunction with evidence of lava flow from the vent, suggests control by combined volcano-tectonic processes.
This image from NASA's Mars Reconnaissance Orbiter shows cones with summit pits that are very similar to cinder cones on Earth. They are also very well-preserved, peppered by only small impact craters, so they must be geologically young.
Curiosity Trekking, Viewed from Orbit in December 2013
NASA's Curiosity Mars rover and tracks left by its driving appear in this portion of a Dec. 11, 2013, observation by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. The rover is near the lower-left corner of this view.
Curiosity Rover Tracks, Viewed from Orbit in December 2013
Two parallel tracks left by the wheels of NASA's Curiosity Mars rover cross rugged ground in this portion of an observation by the HiRISE camera on NASA's Mars Reconnaissance Orbiter on Dec. 11, 2013. The rover itself does not appear in this image.