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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. [ 12][ 13] It has a diameter of about 1,392,684 km, [ 5] about 109 times that of Earth, and its mass (about 2 × 10 30 kilograms, 330,000 times that of Earth) accounts for about 99.86% of the total ... rewards credit cards comparison