A few facts about Sun
The sun is the star at the center of the solar system. It is nearly a perfect sphere of hot plasma, heated to incandescence by nuclear reaction in its core, radiating the energy mainly as visible light and infrared radiation. It is by far the most important source of energy for life on Earth. Its diameter is about 1.34 million kilometers or 109 times as that of the Earth. Its mass is about 330000 times that of the Earth and accounts for about 99.86% of the total mass of the Solar System. Roughly three quarters of the sun mass consists of Hydrogen, the rest is mostly Helium with much smaller quantities of heavier elements, including Oxygen, Carbon, Neon and Iron.