'Wishstone' Martian rock, c 2005.
© National Aeronautics & Space Administration / Science & Society
False-colour view of rocks on the surface of Mars taken by the Spirit rover. Spirit used its rock abrasion tool, (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-colour view emphasizing the freshly ground dust around the hole cut by the RAT.