Countdown Nears: Final Tests

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.

Ancient floods carved Kasei Valles

Image of Hesperia Planum from the HiRISE camera on Mars Reconnaissance Orbiter.

This map shows the route driven by NASA's Mars rover Curiosity through the 56th Martian day, or sol, of the rover's mission on Mars (Oct. 2, 2012).

This map shows the route driven by NASA's Curiosity Mars rover from the "Bradbury Landing" location where it landed in August 2012 (the start of the line in upper right) to a major waypoint called ...

This HiRISE image shows fractured mounds on the southern edge of Elysium Planitia.

Artist's concept of Mars Reconnaissance Orbiter en route to Mars.

This image from the NASA Mars Reconnaissance Orbiter shows an impact scar on Mars made by pieces of the NASA Mars Science Laboratory spacecraft that the spacecraft shed just before entering the Mar...

This proposed future Mars landing site in Acidalia Planitia targets densely occurring mounds thought to be mud volcanoes.

The enhanced-color subimage shows a great variety of colors and textures in the bedrock, where it is exposed from beneath a dark fine-grained mantle. The mantle is sometimes modified by the wind in...

The white arrows indicate locations in this scene where numerous seasonal dark streaks, called "recurring slope lineae," have been identified in the Coprates Montes area of Mars' Valles Marineris b...

A new map of Mars' gravity made with three NASA spacecraft is the most detailed to date, providing a revealing glimpse into the hidden interior of the Red Planet. Satellites always orbit a planet's...

CRISM observations of this region of the Noctis Labyrinthus formation have shown indications of iron-bearing sulfates and phyllosilicate (clay) minerals.

This image covers a region of Mars near Nili Fossae that contains some of the best exposures of ancient bedrock on Mars.

A towering dust devil casts a serpentine shadow over the Martian surface in this image acquired by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.

Animation of a skinny "dust devil" on the dust-covered Amazonis Planitia region of northern Mars. (No audio)

A radar on NASA's Mars Reconnaissance Orbiter has detected widespread deposits of glacial ice in the mid-latitudes of Mars.

In the novel and movie "The Martian," an astronaut's adventures take him to the rim of Mawrth Crater. This image from the HiRISE camera on NASA's Mars Reconnaissance Orbiter shows the nature of thi...

The HiRISE camera aboard NASA’s Mars Reconnaissance Orbiter took this image of the Perseverance rover on Feb. 24, 2021.

Syrtis Major Region

Ring and Cone Structures and Platy-Ridged Terrain in Amazonis Planitia

This image shows the location of the rover-containing section of new color image in relation to Solander Point.

This sinuous raised ridge is thought to be an inverted stream channel.  These are formerly low-lying streambeds that became elevated because the original depression is filled with materials (such a...

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.

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