2015年7月21日 星期二

A New Spin on the Journey to Mars - By Way of the Moon

NASA-Funded Study Reduces Cost of Human Missions to Moon and Mars by Factor of Ten, National Space Society and Space Frontier Foundation "Note from the authors: This study by NexGen Space LLC (NexGen) was partly funded by a grant from...

from NASA Watch http://ift.tt/1Ok1UTe
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