The Neutral Gas and Ion Mass Spectrometer (NGIMS) instrument, shown here at NASA's Goddard Space Flight Center in Greenbelt, Md., before its integration onto NASA's  Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft.

The Neutral Gas and Ion Mass Spectrometer (NGIMS) instrument, shown here at NASA's Goddard Space Flight Center in Greenbelt, Md., before its integration onto NASA’s Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft.

Credit

NASA/GSFC

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