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Curiosity's APXS pressed against John Klein, sol 168
Curiosity's APXS pressed against John Klein, sol 168 On sol 168 (January 25, 2013), Curiosity was beginning the lengthy process of analyzing and then sampling John Klein. Here, the APXS (Alpha Particle X-Ray Spectrometer) is pressed against the rock. NASA / JPL / MSSS / "Airbag"