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Date: 2006-10-18 19:01:10Exploration of the Moon Mars exploration Space colonization Colonization of the Moon Manned mission to Mars David S. McKay NASA Moon DIRECT Spaceflight Space Human spaceflight | (NASA-SO-SO OVERVIEW Q) SPACE (NASA)Add to Reading ListSource URL: www.nss.orgDownload Document from Source WebsiteFile Size: 2,49 MBShare Document on Facebook |