nuclear and aerospace engineer, thorium evangelist, father of four
Shorts
The International Space Station experiences constant, low-level aerodynamic drag, which causes its orbit to steadily decay. Electrodynamic tethers had long been proposed to generate thrust by using solar power to drive electrical current (collected from the ionosphere in this animation) against an induced voltage, adding orbital energy to compensate for that which was lost to aero drag.
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I applied Canfield joint technology to a ring-array solar concentrator to develop a solar power system that could work at the poles of the Moon. Or anywhere else, for that matter.