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Date: 2013-04-30 20:24:25Spacecraft propulsion Human spaceflight Plasma physics Space colonization Variable Specific Impulse Magnetoplasma Rocket Mars exploration Ad Astra Rocket Company Manned mission to Mars Plasma propulsion engine Spaceflight Space technology Aerospace engineering | Henri Tapani Heinonen Manned mission to Mars in 2019 A Proposal for the Augustine CommissionAdd to Reading ListSource URL: www.nasa.govDownload Document from Source WebsiteFile Size: 124,05 KBShare Document on Facebook |