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Friday, November 11, 2011
The power from the Sun comes from within the sun itself. Like other stars, the sun is a big ball of gases--primarily hydrogen and helium atoms.
The hydrogen atoms from the sun's core combined to make helium and generate energy in a method called nuclear fusion.
On nuclear fusion, the sun’s profoundly high pressure and temperature set off hydrogen atoms to come apart and their nuclei (the central cores of the atoms) to join or bring together. Four hydrogen nuclei join to become one helium atom. However the helium atom has less mass compared to the four hydrogen atoms that merged. A few matter is lost over nuclear fusion. The lost matter is emitted in to space as radiant energy.
It will take millions of years for the energy from the sun’s core to make its path to the solar surface area, after which somewhat over 8 minutes to travel the 93 million miles to earth. The solar energy travels to the earth at the speed of 186,000 miles per second, the speed of the sun's rays.
Just a small portion of the energy radiated from the sun into space strikes the planet earth, one part in 2 billion. Yet this level of energy is massive. Everyday adequate energy strikes United States of America to supply the nation’s energy needs for one and a half years!
Where does this energy end up?
About 15 percent from the sun’s energy which touches the planet earth, is mirrored back to space. Another thirty percent is used to evaporate water, which, when lifted to atmosphere, results in rainfall. The sun's energy can be absorbed by plants, the land, and the oceans. The remaining might be put into use to supply our Solar Power needs.