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sun


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The central star (G spectral type) in the solar system, 696 000 km in radius, 333 000 × Earth mass, 1 300 000 × Earth volume, and with a mean density of 1410 kg/m3. The equator is inclined at 7.25° to the plane of the ecliptic. It is principally composed of hydrogen and helium. The visible surface is the ‘photosphere’ (temperature 6000 K). The Si-normalized solar abundances for the terrestrially non-gaseous elements match those of the C1 carbonaceous chondrites.


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