NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Et-Then rock. Close-up of a rock called Et-Then at the Rocknest site on the surface of Mars. Imaged by the Mars Hand Lens Imager (MAHLI) on NASA's Curiosity Rover, during the mission's 82nd sol, or Martian day (29th October 2012), from a distance of about 40 centimetres. This image covers an area about 24 by 18 centimetres.
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