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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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Sunken and Pitted Ejecta

Sunken and Pitted Ejecta

The objective of this observation was to examine the edge of impact ejecta from a crater to the north-west of this area (north is up, west is to the left).
Mound in Chryse Planitia

A Lonely Mound in Chryse Planitia

A simple proposition: to compare and contrast this pitted mound that is similar in appearance to those in Utopia Planitia, but rarely observed here in Chryse Planitia.

Dunes in Meridiani Planum

HiRISE monitors dune fields across Mars to track how they are changing. The mobile sand also cleans dust off of the bedrock in inter-dune areas, providing good views of the bedrock structures and colors.
Old Features and New

Old Features and New

This image covers a portion of a typical impact crater in Terra Sirenum at about 40 degrees south latitude on Mars.

A Flow near Huo Hsing Vallis

The lava appears to overlay sand and sedimentary deposits, so finer scale This image shows a potential outflow channel near Huo Hsing Vallis into an old crater.

InSight (USA)

The Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission is a robotic lander designed to study the deep interior of the planet Mars.

Opportunity (USA)

Opportunity landed in Meridiani Planum on January 25, 2004, three weeks after its twin Spirit touched down on the other side of the planet.