Grad student Nicholas Boyd (left) and Principal Investigator Ralf Gellert, both of the University of Guelph, Ontario, Canada, prepare for the installation of the Alpha Particle X-ray Spectrometer sensor head during testing at NASA's Jet Propulsion Laboratory.

February 18, 2011

Grad student Nicholas Boyd (left) and Principal Investigator Ralf Gellert, both of the University of Guelph, Ontario, Canada, prepare for the installation of the Alpha Particle X-ray Spectrometer sensor head during testing at NASA's Jet Propulsion Laboratory.

Credits

NASA/JPL-Caltech

ENLARGE

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