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Sun

The sun is the star at the center of the solar system. it is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields. it has a diameter of about 1,392,684 km, about 109 times that of earth, and its mass (about 2×10 kilograms, 330,000 times that of earth) accounts for about 99.86% of the total mass of the solar system. chemically, about three quarters of the sun's mass consists of hydrogen, while the rest is mostly helium.