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Spirit’s ‘Wishstone’

Spirit's 'Wishstone'
The Spirit rover had to dig a little deeper to find out more about this martian rock, dubbed "Wishstone." Spirit used its rock abrasion tool, or "RAT," first to scour a patch of the rock's surface with a wire brush, then to grind away the surface to reveal interior material.

The Spirit rover had to dig a little deeper to find out more about this martian rock, dubbed “Wishstone.”
Spirit used its rock abrasion tool, or “RAT,” first to scour a patch of the rock’s surface with a wire brush, then to grind away the surface to reveal interior material. Examination of the exposed circle revealed that the rock is rich in phosphorus. Spirit used its panoramic camera to take the three individual images that were combined to produce this false-color view emphasizing the freshly ground dust around the hole cut by the RAT.Image Credit: NASA/JPL/Cornell