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There are several arguments which favour Mars over Mercury as a candidate for human missions. Getting there and coming home As the question and other answers have highlighted, the delta-v for transferring to Mercury is significantly higher than required for transferring to Mars. This will translate to monumentally higher propellant and launch costs for the ...


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To see why a Hohmann transfer is applicable for a symmetric jump preserving phase angle, let's consider what the semi-major axis of the transfer ellipse is: $$a_{H} = \frac{periapsis_H + apoapsis_H}{2}$$ $$a_{H} = \frac{a - \Delta a + a + \Delta a}{2}$$ $$a_{H} = a$$ That is, the semi-major axis of the Hohmann transfer orbit is equal to the nominal orbit! ...


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