Windows to Fresh Rock

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Caption:

This hazard-avoidance camera image was taken by NASA's Mars Exploration Rover Spirit on sol 79 after completing a two-location brushing on the rock dubbed "Mazatzal." A coating of fine, dust-like material was successfully removed from targets named "Illinois" (right) and "New York" (left), revealing clean rock underneath. In this image, Spirit's panoramic camera mast assembly, or camera head, can be seen shadowing Mazatzal's surface. The center of the two brushed spots are approximately 10 centimeters (3.9 inches) apart and were aggressively analyzed by the instruments on the robotic arm on sol 80. On sol 81, the rover drilled into the New York target to expose the original rock underneath.

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