The sun is a star at the center of the solar system planets, dwarf planets, asteroids, and comets. "Orbit around the sun at all. The sun is a star, such as important to the world provide energy to the plants in the form of light. And plants can change light into energy in the fixation of carbon dioxide gas into sugar. As well as the world has a variety of weather conditions conducive to life.The sun is composed of hydrogen 74% by mass percentage 25 helium mass and other trace elements in small quantities. The sun is classified in the spectrum. G2V which G2 means the sun surface temperature, about 5 780 Kelvin (about 5 515 C, or 9 940 degrees, Ren Hai). The sun is white, but seen on earth is yellow. Due to the scattering of light, the V (number 5) indicates that the sun is in the main sequence. Energy produced by melting the hydrogen into helium, and was in a state of balance, not collapse or expand.The sun is far away from the Milky way is estimated, 26 000 light-years. Take about 225-250 million years anniversary Galaxy orbit, orbital speed 215 kilometers per second, or 1 light-years. Every year, 1 400
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