The Sun is the nearest star with mother with average distance 149,680,000 kilometers (93,026,724 miles). Sun and nine planets form solar system. Sun have diameter 1,391,980 kilometers with surface temperature 5,500 Celsius and core temperature 15 millions Celsius. Sun classified as dwarf star G's type Light from time-consuming sun 8 minutes to reach to-earth and this bright light could cause anyone look straight to the sun, become blind.
Sun is sphere plasma with mass environment 2 x 1030 kg. To continue shine, sun, which comprise from hot gas change hydrogen element to helium through reaction nuclear combination at the rate 600 millions tan, therefore tan four million loss second every mass. Sun are believed formed 5,000 millions years ago. Mass of the sun density is 1.41 compared mass of water. Amount of solar energy that reaches to surface of the earth known as solar constant equal 1.37 kilowatts every square one meter second.
Sun rotate 25.04 every earth day rotation and have gravity 27.9 times earth gravity. Exist gas lift burning can reach until 100,000 kilometers to space. Suns flare would disturb communication wave such as radio, TV and radar on earth and are able damage satellite or space station not protected. Sun also made radio wave, wave ultraviolet, radiance infra-red, X-ray, and solar-wind that spreads whole solar system.
Earth protected from solar-wind by earth magnetic field, ozone layer interim also protect earth from ultraviolet radiation and infrared. Exist black puddle that exists from time to during in the sun those caused by temperature difference in surface of the sun. The black puddle indicates area less warm compared to other areas and hit area exceeds size of the earth. Some cycles of the moon round the earth prevent sunshine from reaching to-earth, therefore cause eclipse of the sun incident happened.
