solar system, Melas Chasma, the canyon pictured above, is the deepest in the solar system. In this image from the European Space Agency’s Mars Express orbiter, the valley on the left (darker area) sits a whopping 5.6 miles below the plateau on the right (lighter area).

Compared to the average shape of Mars, known as the “aeroid,” the canyon floor sinks down about 3.1 miles. Planetary scientists would love to use sea level measurements to describe Martian surface features, but there’s no ocean on the red planet anymore and any signs of an ocean are long since warped by millions of years of surface deformation.

The photo above covers about 7,700 square miles, or about the size of New Jersey, which makes it only a tiny postage stamp of Mars’ deepest, longest and most prominent scar — the 2,500-mile-long Valles Marineris rift valley (below).

Images: 1) Melas Chasma – high-resolution image, ESA/DLR/FU Berlin (G. Neukum), 2) Viking 1 and 2 orbiter image collage of Valles Marineris canyon – high-resolution image. Courtesy NASA/JPL-Caltech

See Also:

• Hopping Mars Rover Could Be Superfast Explorer
• Exotic New Mars Images From Orbiting Telephoto Studio
• Where Will Next Mars Rover Land?
• Strange Places on Mars: What Do You Want to See Next?
• Mars Dust-Devil Mystery Solved on Earth

Authors: Dave Mosher

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