The Sun is the star at the center of the Solar System and is by far the most important source of energy for life on Earth. It is a nearly perfect spherical ball of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. Its diameter is about 109 times that of Earth, and it has a mass about 330,000 times that of Earth, accounting for about 99.86% of the total mass of the Solar System. Chemically, about three quarters of the Sun's mass consists of hydrogen, whereas the rest is mostly helium, and much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. Layers of the sun: Core Radiative zone Tachocline Convective zone
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chemical chemistry chromosphere convective core corona education flare fusion geothermal giant granule layers luminance magnetic nature neutrinos penumbra photons photosphere physics prominence radiative region science solar solarwind spots star sun sunlight sunspots tachocline temperature thermonuclear transition trubulent umbra zone
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