Oh, in that case then the relevant metric is probably delta-v in which case the Moon is always a lot closer to Mars than th Earth is. See here: http://i.imgur

Oh, in that case then the relevant metric is probably delta-v in which case the Moon is always a lot closer to Mars than th Earth is. See here: http://i.imgur.com/SqdzxzF.png http://i.imgur.com/SqdzxzF.png