Artist concept of Glaciers on Mars

These examples of one distinctive type of Martian gullies, called "linear gullies," are on a dune in Matara Crater, seen at different times of year to observe changes.

NASA’s Perseverance Mars rover and Ingenuity helicopter were spotted on the surface of the Red Planet in this black-and-white image captured Feb. 26, 2022, by the HiRISE camera aboard NASA’s Mars R...

A lunar eclipse, a solar eclipse and Mars has a close encounter with a comet.

This image from NASA's Mars Reconnaissance Orbiter shows an impact crater that triggered a slope streak. When a meteoroid hit the surface and exploded to make the crater, it destabilized the slope ...

With the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument just above his head, a technician at NASA’s Kennedy Space Center works on the Mars Reconnaissance Orbiter spacecraft...

This image shows dunes near the north pole of Mars. The north pole is surrounded by a vast "sea" of basaltic sand dunes, and the dunes imaged here are similar to barchan dunes that are commonly fo...

Eridania Region Outcrops

This graphic depicts the relative shapes and distances from Mars for five active orbiter missions plus the planet's two natural satellites. It illustrates the potential for intersections of the spa...

This image acquired on December 3, 2018 by NASAs Mars Reconnaissance Orbiter, shows a cross-section of a dune field. Dune shape depends on several factors, including the amount of sand present and ...

NASA's Mars Reconnaissance Orbiter, nearing the 10th anniversary of its arrival at Mars, used its High Resolution Imaging Science Experiment (HiRISE) camera to obtain this view of an area with unus...

This pair of images covers one of many sites on Mars where researchers use the HiRISE camera on NASA's Mars Reconnaissance Orbiter to study changes in gullies on slopes. Changes such as the ones v...

This image reveals exposed layers in Noctis Labyrinthus which may contain signatures of iron bearing sulfates and phyllosilcate (clay) minerals.

This kickoff of a new Mars video series covers Opportunity's 14th anniversary on the Red Planet, Curiosity's spectacular panorama and ice deposits spotted by an orbiter.

This image from NASA's Mars Reconnaissance Orbiter shows a hill with a central crater. Such features have been interpreted as both mud volcanoes (really a sedimentary structure) and as actual volca...

The Mars Reconnaissance Orbiter has seen many places on the planet. One of the most interesting is one of the great canyon systems on Mars.

Icy Layers and Climate Fluctuations near the Martian North Pole

Eberswalde Crater contains layered rocks about 100-meters thick exposed in a a well-preserved delta.

This 3D, or stereo anaglyph, view shows the parachute and back shell that helped guide NASA's Curiosity to the surface of Mars. The view was produced from images taken by the High Resolution Imagin...

Mysterious features on slopes hint there could be water flows on Mars.

This graphic illustrates where Mars mineral-mapping from orbit has detected minerals that can indicate where a volcano erupted beneath an ice sheet. The site is far from any ice sheet on modern Mar...

The Mars Climate Sounder, an instrument on NASA's Mars Reconnaissance Orbiter designed to monitor daily changes in the global atmosphere of Mars, made its first observations of Mars on March 24, 2006.

This March 20, 2014, image from the MARCI camera on NASA's Mars Reconnaissance Orbiter has a dark spot (at center of inscribed rectangle) noticed while the image was being examined for a weather re...

Dark, narrow streaks on Martian slopes such as these at Hale Crater are inferred to have been formed by seasonal flow of water on contemporary Mars. Detection of hydrated salts at the streaks suppo...

Sand dunes are among the most widespread wind-formed (aeolian) features present on Mars.

This image shows details of the lava covered plains near the equator of Mars. The darker looking area has a rough lava surface with all the shadows giving the region a darker appearance.