Martian soil

Martian soil

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Credit: NASA/Science Source/SCIENCE PHOTO LIBRARY

Caption: Colour enhanced micrograph of a patch of soil on Mars, showing spherical grains on a fine layer of sand. The spherical particles may have been formed by the cooling of molten rock, or by the accretion in water of successive layers around a smaller particle. This image was taken by the microscopic imager instrument on the Mars Exploration Rover Opportunity, near the rock outcrop called Stone Mountain. Opportunity reached Stone Mountain on 5 February 2004. This was the most detailed view of the soil to date. The image is a mosaic, formed from several separate images.

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Keywords: 2004, american, arid, astronomy, black-and-white, coarse, desert, dry, dust, dusty, exploration, february, fine, geological, geology, grain, grains, horizontal, image, imager, instrument, mars, martian surface, micrograph, microscopic, monochrome, mosaic, nasa, opportunity, panoramic, planet, planetary, red, research, rock, rocks, round, rover, sand, sandy, science, soil, solar system, space, spherical, universe, us

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