Full disk color image of Mars showing Valles Marineris canyon and volcanoes.
Photojournal: PIA04304
Source: NASA/JPL-Caltech 
Published: July 9, 2013

This mosaic of Mars is a compilation of images captured by the Viking Orbiter 1.

The center of the scene shows the entire Valles Marineris canyon system, more than 2,000 miles (3,000 kilometers) long, 370 miles (600 kilometers) wide and 5 miles (8 kilometers) deep, extending from Noctis Labyrinthus, the arcuate system of graben to the west, to the chaotic terrain to the east.

Composite image of Mars showing massive canyon stretching across most of its surface. Overlay of United States borders on composite image of Mars's Valles Marineris. The canyon is longer than the U.S. is wide.

A Grand Scale

This infographic uses composite orbiter images and an outline of the United States to show the scale of the Valles Marineris.

The mosaic is composed of 102 Viking Orbiter images of Mars. Many huge ancient river channels begin from the chaotic terrain from north-central canyons and run north.

The three Tharsis volcanoes (dark red spots), each about 25 kilometers high, are visible to the west. South of Valles Marineris is very ancient terrain covered by many impact craters.

ENLARGE

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