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  • The triangular pattern of small ridges seen at the upper right in this image and elsewhere on the rock is characteristic of iron-nickel meteorites found on Earth.

    Magnified Look at a Meteorite on Mars

    NASA's Mars Exploration Rover Opportunity used its microscopic imager to get this view of the surface of a rock called "Block Island" during the 1,963rd Martian day.

  • This view of a rock called Block Island, the largest meteorite yet found on Mars.

    'Block Island' Meteorite on Mars, Sol 1961 (False Color)

    This view of a rock called 'Block Island,' the largest meteorite yet found on Mars, comes from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity.

  • Panelists reviewed results to date from testing possible maneuvers to use in driving NASA's Mars Rover Spirit

    Review of Options for Driving Spirit

    Panelists reviewed results from testing possible maneuvers to use in freeing Spirit.

  • Composition measurements by NASA's Mars Exploration Rover Opportunity confirm that this rock on the Martian surface is an iron-nickel meteorite.

    'Block Island' Meteorite on Mars, Sol 1961 (Stereo)

    Composition measurements by NASA's Mars Exploration Rover Opportunity confirm that this rock on the Martian surface is an iron-nickel meteorite.

  • Composition measurements by NASA's Mars Exploration Rover Opportunity confirm that this rock on the Martian surface is an iron-nickel meteorite.

    'Block Island' Meteorite on Mars, Sol 1961

    Composition measurements by NASA's Mars Exploration Rover Opportunity confirm that this rock on the Martian surface is an iron-nickel meteorite.

  • Opportunity Traverse Map update until Sol 1961

    Opportunity's traverse map through Sol 1961

    Where are the rovers now? Opportunity's traverse map through Sol 1961.

  • Block Island Close-up

    Block Island Close-up

    This is a picture of "Block Island," an odd-shaped, dark rock, which may be a meteorite.

  • Block Island in Sight

    Block Island in Sight

    Scientists will be using an instrument on the Opportunity rover to test the rock and see if it is a meteorite.

  • Rover testing maneuvers in a sandbox at the Jet Propulsion Laboratory aimed to help free the Spirit rover stuck on Mars.

    Uphill Climb

    Mars Exploration Rover team members continued longer-duration test runs this week, driving the test rover forward and uphill in a crab-like position.

  • Rover team members discuss the next step in preparing for a new phase in testing of possible moves for getting NASA's Mars rover Spirit out of a sandtrap on Mars.

    Sandbox Tracks from Rover Testing

    Rover team members at NASA's Jet Propulsion Laboratory, Pasadena, Calif., on July 24, 2009, discuss the next step in preparing for a new phase in testing of possible moves for getting NASA's Mars rover Spirit out of a sandtrap on Mars.

  • NASA's Mars Exploration Rover Opportunity used its navigation camera to take the images combined into this 360-degree view of the rover's surroundings

    Opportunity's Surroundings on Sol 1950

    NASA's Mars Exploration Rover Opportunity used its navigation camera to take the images combined into this 360-degree view of the rover's surroundings on the 1,950th Martian day, or sol, of its surface mission (July 19, 2009).

  • NASA's Mars Exploration Rover Opportunity used its navigation camera to take the images combined into this stereo, 360-degree view of the rover's surroundings

    Opportunity's Surroundings on Sol 1950 (Stereo)

    NASA's Mars Exploration Rover Opportunity used its navigation camera to take the images combined into this stereo, 360-degree view of the rover's surroundings on the 1,950th Martian day, or sol, of its surface mission (July 19, 2009).

  • NASA's Mars Exploration Rover Opportunity used its navigation camera to take the images combined into this 360-degree view of the rover's surroundings

    Opportunity's Surroundings on Sol 1950 (Vertical)

    NASA's Mars Exploration Rover Opportunity used its navigation camera to take the images combined into this 360-degree view of the rover's surroundings on the 1,950th Martian day, or sol, of its surface mission (July 19, 2009).

  • Mars Exploration Rover team members tested how altering the order in which individual wheels turn for steering affects how those turns dig the wheels deeper into soft soil.

    Testing Sequences of Wheel Turns

    Mars Exploration Rover team members on July 21, 2009, tested how altering the order in which individual wheels turn for steering affects how those turns dig the wheels deeper into soft soil.

  • In this view from behind a test rover, the rear wheels of the rover are turned toward the left, and the left-front wheel is turned toward the the right.

    Preparing for Rover Pivot Test

    In this view from behind a test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., the rear wheels of the rover are turned toward the left, and the left-front wheel is turned toward the the right.

  • Rover team members Kim Lichtenberg and Joseph Carsten watch motions of a test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif.

    Observing a Rover Pivot Test

    Rover team members Kim Lichtenberg and Joseph Carsten watch motions of a test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., as the rover carries out commands for driving forward with an arc toward the right.

  • This scene combines three frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit

    Spirit's Look Ahead After Sol 1866 Drive

    This scene combines three frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,866th Martian day, or sol, of Spirit's mission on Mars (April 3, 2009).

  • This stereo scene combines frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit

    Spirit's Look Ahead After Sol 1866 Drive (Stereo)

    This stereo scene combines frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,866th Martian day, or sol, of Spirit's mission on Mars (April 3, 2009).

  • This scene combines three frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit

    Spirit's Look Ahead on Sol 1869

    This scene combines three frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,869th Martian day, or sol, of Spirit's mission on Mars (April 6, 2009).

  • This stereo scene combines frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit

    Spirit's Look Ahead on Sol 1869 (Stereo)

    This stereo scene combines frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,869th Martian day, or sol, of Spirit's mission on Mars (April 6, 2009).