NASA / JPL-CALTECH / MSSS / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / MSSS / SCIENCE PHOTO LIBRARY
Martian pebbles, as imaged by NASA's Curiosity rover. This rover, part of the Mars Science Laboratory (MSL) mission, landed in the Gale Crater, Mars, on 6 August 2012. This image is part of testing of the rover's Mars Hand Lens Imager (MAHLI) instrument. The dust cover on MAHLI was opened for the first time during the 33rd Martian day (sol) of the mission (8 September 2012). This patch of ground is about 86 centimetres across, with the large pebble (lower right) around 8 centimetres across. Shadows cast are visible, as well as the varying thickness of dust on the surrounding ground, possibly influenced by the larger pebbles.
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