This mosaic of four frames from the microscopic imager on NASA's Mars Exploration Rover Spirit shows the texture of a target called "Davis" on a rock outcrop called "Jibsheet" on "Husband Hill" inside Mars' Gusev Crater.
The images were taken on Spirit's 487th Martian day, or "sol (May 17, 2005). The individual frames are each 3 centimetres across and they overlap slightly in this two-by-two array. The glossier central region of the mosaic, about 4.5 centimetres in diameter, was scrubbed with the wire-bristle brush of Spirit's rock abrasion tool. The scale of the images (31 microns per pixel) allows features as small as 0.1 millimetres to be resolved. The image has been rotated 180 degrees