Solar Energy
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Left : Part of the solar energy is lost on its way through the atmosphere by the effects of reflection and absorption. Right : Space-based solar power systems convert sunlight to microwaves outside the atmosphere, avoiding these losses, and the downtime (and cosine losses , for fixed flat-plate collectors) due to the Earth's rotation . Space-based solar power ( SBSP ) is the concept of collecting solar power in space (using an "SPS", that is, a "solar power satellite" or a "satellite power system") for use on Earth .
