The orbit of Earth ranges from 1.47 to 1.52 x 10^11 meters from the Sun. The average light travel time to the earth is 8.3 minutes.
The radius of the sun at 696,000 km is 109 times the Earth's radius.
The composition of the sun is 74% hydrogen, 25% helium and 1% of all other elements.
The center temperature is modeled to be 15.5 million K. The Sun is fueled by the proton cycle of nuclear fusion.
Escape velocity = 618 km/s
Period of rotation 37 days at the poles but 26 days at the equator
Its apparent magnitude is -26.8 and its absolute magnitude is +4.8 .
The sun is 7.7 kpc or 25,000 light years from the center of the galaxy and orbits the galaxy in about 200 million years. This corresponds to an orbital velocity of 230 km/s.
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