This image shows the robotic arm of NASA's Mars rover Curiosity with the first rock touched by an instrument on the arm. The rover placed the APXS instrument onto the rock to assess what chemical elements were present in the rock.

This image shows the robotic arm of NASA's Mars rover Curiosity with the first rock touched by an instrument on the arm. The rover's right Navigation Camera (Navcam) took this image during the 46th Martian day, or sol, of the mission (Sept. 22, 2012). On that sol, the rover placed the Alpha Particle X-Ray Spectrometer (APXS) instrument onto the rock to assess what chemical elements were present in the rock. The rock is named "Jake Matijevic" in commemoration of influential Mars-rover engineer Jacob Matijevic (1947-2012).

JPL manages the Mars Science Laboratory/Curiosity for NASA's Science Mission Directorate in Washington. The rover was designed, developed and assembled at JPL, a division of the California Institute of Technology in Pasadena.

For more about NASA's Curiosity mission, visit: http://www.jpl.nasa.gov/msl, http://www.nasa.gov/mars, and http://marsprogram.jpl.nasa.gov/msl.

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