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Preview Mars Direct: Humans to the Red Planet within a Decade - NASA pdf file

Humans to the Red Planet within a ... whether your goal is to sell rope. Page 3. Earth. Mars. Moon. 3.9 km/s. 6.0 km/s. 4.1 km/s. 1.6 km/s. 3.5 km/s. Rope Sale #1.



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