Using a Tethered Ring White Paper

Tethered rings can be built on Earth, for example in the ocean around Antarctica or in the Pacific Ocean. You can tap power off that inner spinning metering or simply run other electricity up there to magnetically propel a space vessel along the ring until it reaches orbital speed itself. Same concept for a space tower, except here we magnetically select metal pellets or bolts straight up then use magnets at the top to redirect them back down again. The basic models of the over ring, loft room loop, space tower and mass driver all cost in the tens of billions of dollars.

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