Sun
Sun or Surya is also called (from the name of god "Surya" - the Sun God in Hindu belief) is the closest star to Earth with an average distance of 149,680,000 kilometers (93,026,724 miles). The sun and the planets of the eighth (which is already known / discovered by humans) to form the Solar System. The sun is categorized as a small star type G.
Illustration of the structure of the sun

The sun is a ball of incandescent gas and was not really round. Sun has the equator and poles since the rotational motion. Diameter ekuatorialnya 864,000 miles, while the median line between the poles 43 miles shorter. Sun is a member of the largest solar system, because 98% of the mass of the Solar System accumulated in the sun.

In addition to the center of circulation, the sun is also a central source of energy in the solar neighborhood. The sun's core and consists of three layers of skin, each photosphere, chromosphere and corona. To continue to shine, the sun, which consists of hot gas hydrogen exchange substances with substances helium through nuclear fusion reactions at levels of 600 million tonnes, with the loss of four million tons of mass each time.

The sun is believed to form in 4.6 billion years ago. Density is 1.41 solar masses versus mass of water. Total solar energy reaching the Earth's surface that are recognized as the solar constant equal to 1370 watts per square meter at any time. The sun as the center of the Solar System is a second generation star. Material from the sun formed from the explosion of the first generation of stars like that are believed by scientists, that the universe was formed by the big bang explosion about 14,000 million years ago.