Quote:
Originally Posted by TGLS
Low efficiency rockets could plausibly "island hop" from space rock to space rock, as adding more propellant to a rocket has declining gains.
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Err, no. This is the classical mistake when comparing space travel to sea travel. To land on a rock and pick up fuel, your craft has to burn fuel to slow down, and then to speed back up again. This usually ends up wasting time on the journey as compared to coasting the whole way.