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Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System.

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Athabasca Valles

Athabasca Valles

This image is of the upper part of Athabasca Valles, a very young flood channel on Mars that might have been carved by a flood of lava instead of a flood of water.
Noachis Terra

Detecting Olivine near Noachis Terra

This observation shows the bedrock on the floor of a crater near Noachis Terra. This crater is unique because it has been very well characterized as being olivine rich.
Olympia Undae

Those Gypsum Dunes

This image suggestion outlines a contact between gypsum-rich dunes in Olympia Undae and flat-lying layers of the basal…
Terra Sabaea

Possible Impact Melt in Terra Sabaea

Nighttime and daytime infrared images from THEMIS suggest a consolidated deposit in the floor of this ancient crater in Terra Sabaea, potentially with some bedrock exposure.
Echua Chasma

A Rising Ridge

This obsevation focuses a ridge that is standing above the old lava surface of the floor of Echua Chasma.
Fans and Polygons

Fans and Polygons

This is a place where fans emerge relatively late in the Martian spring from polygonal cracks owing to the process of sublimation.