Carle Pieters, principal investigator, Moon Mineralogy Mapper, Brown University (L) speaks as Rob Green, project instrument scientist, Moon Mineralogy Mapper, NASA's Jet Propulsion Laboratory in Pasadena, Calif looks at a briefing to discuss new science data from the moon collected during national and international space missions September 24, 2009 at NASA Headquarters in Washington, DC. Getty Images logo Getty Images 29 months ago

Carle Pieters, principal investigator, Moon Mineralogy Mapper, Brown University (L) speaks as Rob Green, project instrument scientist, Moon Mineralogy Mapper, NASA's Jet Propulsion Laboratory in Pasadena, Calif looks at a briefing to discuss new science data from the moon collected during national and international space missions September 24, 2009 at NASA Headquarters in Washington, DC.