Countdown Nears: Final Tests

This view of an inverted crater in the Arabia Terra region of Mars is among the images taken by NASA's Mars Reconnaissance Orbiter in early 2010 as the spacecraft approached the 100-terabit milesto...

NASA Science missions circle Earth, the Sun, the Moon, Mars and many other destinations within our solar system, including spacecraft that look out even further into our universe. The Science Fleet...

NASA's Curiosity Mars rover can be seen at the "Pahrump Hills" area of Gale Crater in this view from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orb...

Polar Layered Deposits Stratigraphy Near Chasma Australe

A configuration interpreted as the United Kingdom's Beagle 2 Lander, with solar panels at least partially deployed, is indicated in this composite of two images from the High Resolution Imaging Sci...

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...

Martian gullies as seen in the top image from HiRISE on NASA's Mars Reconnaissance Orbiter resemble gullies on Earth that are carved by liquid water. However, when they are observed with the additi...

This fresh crater is located in the northern mid-latitudes. It is designated as fresh because of its very sharp rim.

This artist's concept of NASA's Mars Reconnaissance Orbiter at Mars features one of its instruments -- the Mars Climate Sounder -- in action.

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 ...

The Electris region of Mars contains some interesting features, such as the raised-relief blocks of material visible in this image.

This global map of Mars was acquired on July 31, 2012, by the Mars Color Imager instrument on NASA's Mars Reconnaissance Orbiter.

This image of Santa Maria Crater was taken by the High Resolution Imaging Science Experiment (HiRISE) camera on Mars Reconnaissance Orbiter.

This is a diagram that shows the launch phases for the Mars Reconnaissance Orbiter.

This near-global map was captured by NASA’s Mars Reconnaissance Orbiter using its Compact Reconnaissance Imaging Spectrometer for Mars, or CRISM. The yellow square indicates the Nili Fossae region ...

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 image, acquired on May 13, 2018 by NASA's Mars Reconnaissance Orbiter, shows sand dunes scouring what appears to be a highly-cratered, old lava flow in the Tempe Terra region, located in the N...

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

Several types of downhill flow features have been observed on Mars. This image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter is an exampl...

This area at the base of Mount Sharp on Mars includes a pale outcrop, called "Pahrump Hills," that NASA's Curiosity Mars rover investigated from September 2014 to March 2015, and the "Artist's Driv...

Although the season is late spring, carbon dioxide ice still covers much of the surface at this high latitude site.

This image acquired on December 26, 2018 by NASAs Mars Reconnaissance Orbiter, shows the hills that resulted from uplifted rocks due to an impact that formed the 230-kilometer diameter Galle Crater.

Impact cratering and erosion combine to reveal the composition of the Martian underground by exposing materials from the subsurface.

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter snapped this series of false-color pictures of sand dunes in the north polar region of Mars

This map indicates some of the geological information gained from orbital observations of Endeavour Crater, which has been the long-term destination for NASA's Mars Exploration Rover Opportunity si...