There is a re-examination of space tethers and skyhooks to find near terms use cases. Harsimony at Greaterwrong.com provides the analysis of value for tethers when we have a lot of space launches and space activity.
A tether that spins at 1.74 km/s is ideal for some boosting to the moon. The fuel cost per launch is 293 tonnes, less than half the 713 tonn…
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