A striking image from NASA's Mars Reconnaissance Orbiter shows a mound within the area of a trough cutting into Mars' north polar layered deposits.
Dense clusters of crack-like structures called deformation bands form the linear ridges prominent in this image from NASA's Mars Reconnaissance Orbiter.
This image in enhanced color from visible-light wavelengths shows light-toned rugged highland material in an area near the Martian equator.
This image spans the floor of Ius Chasma's southern trench.
Features believed to indicate where channels used to flow on Mars can be seen in this image taken by the High Resolution Imaging Science Experiment (HiRISE) camera in NASA's Mars Reconnaissance Orbiter.
This map showing the location of some clay minerals in of a portion of the Mawrth Vallis region of Mars covers an area about 10 kilometers (6.2 mile) wide.
This three-dimensional image of a trough in the Nili Fossae region of Mars shows a type of minerals called phyllosilicates concentrated on the slopes of mesas and along canyon walls.
A color-enhanced image of the delta in Jezero Crater, which once held a lake.
This image shows a radar view (top) and topographical view (bottom) of the north polar ice cap 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.
This artist's animation illustrates how NASA's Mars Reconnaissance Orbiter used radar to map the insides of the north polar ice cap on Mars.
NASA's Mars Reconnaissance Orbiter captured this view of a large region of northern Mars that includes the Phoenix mission landing target area in the lower right quadrant.
In preparation for the landing of the Mars Phoenix Lander, NASA's Mars Reconnaissance Orbiter has been monitoring weather in the region around the landing site.
NASA's Mars Reconnaissance Orbiter took this image of Martian northern plains, including ground within the targeted landing area for NASA's Phoenix Mars Lander.
Two views of the small Martian moon Phobos, taken 10 minutes apart by NASA's Mars Reconnaissance Orbiter, are combined to produce this stereo view of Phobos.
NASA's Mars Reconnaissance Orbiter was about 4,200 miles from Phobos, the smaller of the two moons of Mars, when the orbiter's high-resolution camera took this image of the moon.
One of two images that NASA's Mars Reconnaissance Orbiter took of the Martian moon Phobos on March 23, 2008, this view was captured from about 3,600 miles away from the moon.
The largest feature on the Martian moon Phobos is the crater named Stickney, with is about 9 kilometers (5.6 miles) in diameter, in the lower right of this image taken by NASA's Mars Reconnaissance Orbiter.
Combining exposures taken in blue-green, red and near-infrared light yields this color image of the Martian moon Phobos, in which the bluer material around the edge of the largest crater may be some of the most freshly exposed surface of the small moon.
In this image from NASA's Mars Reconnaissance Orbiter, craters on part of the surface of the Martian moon Phobos that is shaded from direct sunlight are visible because the moon also is illuminated by sunlight reflected off Mars, or "Marsshine."