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If you want to get back from Mars you need a reusable rocket.
by mrtnmcc 8y ago
If you want to get back from Mars you need a reusable rocket.
- kbutler 8y agoBy that definition, the Apollo program had reusable rockets. (Able to climb back out of a gravity well, leave orbit of a large mass, and return to earth). Escape velocity of Mars is less than half Earth's or about double the moon's.