This image montage features a two-dimensional radar cross section of Mars' north polar cap collected by SHARAD instrument on NASA's Mars Reconnaissance Orbiter spacecraft (top), and a color image mosaic of the polar cap from NASA's Viking project (bottom)
This image from NASA's Mars Reconnaissance Orbiter spacecraft the valley networks on Mars are terrains eroded by flowing water billions of years ago. Where bedrock is well exposed, a variety of colors due to altered minerals and polygonal patterns.
Bedrock Exposures on the Floor of Bakhuysen Crater
This image from NASA's Mars Reconnaissance Orbiter spacecraft shows an exposure of bedrock on the floor of Bakhuysen Crater, an impact crater in Noachis Terra. The bedrock is highly fragmented and fractured.
This image from NASA's Mars Reconnaissance Orbiter spacecraft shows a roughly 3-kilometer impact crater, formed on the sloping walls of Tithonium Chasma, part of the large Valles Marineris canyon system.
The channel feature in this image from NASA's 2001 Mars Odyssey spacecraft is called Mangala Fossa. This feature was formed by tectonic activity, with the walls being faults that allowed the central portion to slide downward forming a graben.
Seasonal Cycles in Curiosity's First Two Martian Years
By monitoring weather throughout two Martian years since landing in Gale Crater in 2012, NASA's Curiosity Mars rover has documented seasonal patterns such as shown in these graphs of temperature, water-vapor content and air pressure.
This image from NASA's 2001 Mars Odyssey spacecraft shows the scarp face of the north polar cap near Abalos Mensa. The top part of the image is the polar cap. This image was collected during northern hemisphere summer.
The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the plains of Terra Sirenum.