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This image highlights the calibration target for the Chemistry and Camera (ChemCam) instrument on NASA's Curiosity rover. The calibration target is one square and a group of nine colored circles. The materials used in these circles are the types of materials scientists anticipated they might encounter on Mars. The square is a titanium alloy with a painted edge.
August 21, 2012 4:37 PM PDT
Photo by: NASA/JPL-Caltech/LANL
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