Here's an interesting article from the Economist Magazine about the possibility of harnessing solar power from space. Apparently, this would provide more power than waiting for the sun's rays to reach earth: "The advantage of intercepting sunlight in space, instead of letting it find its own way through the atmosphere, is that so much gets absorbed by the air. By converting it to the right frequency first (one of the so-called windows in the atmosphere, in which little energy is absorbed) a space-based collector could, enthusiasts claim, yield on average five times as much power as one located on the ground."
Jason E.
Here's the link:http://www.economist.com/node/18864324
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