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
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
newtons first law