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Europe's mission to Mars

http://www.rationalskepticism.org/viewtopic.php?p=2485651#p2485651

Posted: Oct 20, 2016 4:01 pm
by newolder
Gravity > Moon. Atmosphere > Moon. Distance > Moon (requires autonomous reaction to events). Probably more ... but that adds up to 3 times more difficult already. :nod:
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