>>10689794This is what you are referring to, all in all you need 6km/s net delta v more to go to mercury (this includes retroactive rocket breaking) , but this doesn’t fact in free delta v u get from Venus and solar sails ( not a meme This close to the sun). And on a return trip you need 35% less energy to leave mercury than to leave mars. Over all mercury is able to get more “free lunches” than Mars and net energy input is LOWER