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What is solar energy?
       The sun of internal by "hydrogen" gather into a "helium" nuclear reaction, constantly release huge energy, and to keep the space radiation energy, and this energy is solar energy.

      The sun internal this fusion reaction can maintain billions to tens of billions of years of time, the sun internal heat fusion reaction the release of radiant energy, the sun into space emission of radiation power a 3.8 * 10 ^ 23 kw radiation value, of which 2 billion points a reach the earth's atmosphere. Reach the earth's atmosphere of solar, 30% by the atmosphere reflex, 23% absorbed by the atmosphere, the rest of the reach the surface of the earth, and its power to 8 x 10 ^ 13 kw.

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