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JustTheNews 1 point ago +1 / -0

well......what? why? they will probably be powered by a Radioisotope , but a hohmann transfer from earth to mars, it wont need propulsion until it lands....then it takes off and transfers back, they barely use fuel, it is not powered 99.9% of the way there

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JustTheNews 1 point ago +1 / -0

newtons first law