The Sun (The Sun) is the star at the center of the solar system. With a diameter of 1.4 million kilometers, or 109 times the diameter of Earth. A world away from 149,600,000 km or 1 astronomical unit (AU), the sun is 333,000 times more massive than Earth, but with a density of only 0.25 times that of Earth are composed of 74% hydrogen and 25% helium and other elements of 1%.
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