global article

The sun is the nearest star to Earth with an average distance of 149,680,000 km (93,026,724 miles). Sun fruit and eighth planet (which is known / found by humans) formed Tata Surya. Sun categorized as a small star of G.
Sun is a ball of incandescent gas, and the round was not correct. Sun has the equator and poles because rotasinya movement. Diameter ekuatorialnya 864,000 miles, while the middle line between kutubnya 43 miles shorter. The sun is a member of Surya the most, because 98% of the mass Tata Surya collected in the sun.
In addition to the central circulation, the sun is also a central source of energy in the solar system. Sun consists of three core and the skin layer, each fotosfer, kromosfer and corona. To continue to shine, the sun, which consists commute from the hot gas of hydrogen with oxygen substances helium through nuclear fusion reactions at the rate of 600 million tons, with the loss of four million tons of mass every time.
Sun believed to be formed on the 4.6 billion years ago. Mass density, the sun is 1.41 shares of water mass. The amount of energy the sun to the surface of the Earth known as the solar constant rival 1370 watts per square meter each time. The sun as the center Surya is the second generation of stars. Material from the sun formed from the explosion as the first generation of stars believed by scientists that the universe formed by the big bang explosion around 14,000 million years ago.
The distance the sun with Earth
Proximity to the earth, the sun is 93,000,000 miles. Distance is used as an astronomical unit. One astronomical unit (AU = Astronomical Unit) is 93 million miles = 148 million km. Compared with the earth, the diameter of the sun approximately 112 times the diameter of Earth. Style pull the sun approximately 30 times the pull-earth style. Sun through a period of 8 minutes to reach the Earth and the sun shines bright this can lead to the evils of the sun continue to be blind.
Temperature
According to the calculations of experts, the temperature at the surface of the sun around 6,000 degrees Celsius, but there is also mention that the surface temperature of 5,500 degrees Celsius. The type of rock or any metal in the Earth is melting at a temperature as high as that. The highest temperature is located in the middle, which is not less than 25 million degrees Celsius, but also mentioned that the temperature was essentially 15 million degrees Celsius. There is also a mention in the core temperature of the sun think about about 13,889,000 ° C. According to JR Meyer, hot sun meteoric stones originate from a fall at high speed on the surface of the sun. Meanwhile, according to the theory of contraction H Helmholz, the heat comes from gas menyusutnya ball. Another expert, Dr. Bothe said that the heat comes from nuclear reactions called the reaction of hydrogen helium synthetic.
Sun rotation
The sun rotating the earth every 25.04 days and has gravity lap 27.9 times Earth gravity. There julangan very hot gas, which can reach up to 100,000 kilometers into space. Spray sun 'sun Flare' This can disrupt communications such as radio waves, television and radar on Earth and able to damage satellites or space stations that are not protected. Sun also produces radio waves, wave ultra-violet, infra-red rays, X-rays, wind and the sun are to the entire solar system.
Earth protected from the solar wind by earth magnetic fields, while also protecting the ozone layer of Earth from ultra-violet rays and infra-red rays. There are sun spots that appear from time to time in the sun caused by differences in the surface temperature of the sun. Sun spots is indicative of the area "less hot" areas of many other broad reach and exceed the size of Earth. Occasionally circulation Month circumnavigate the earth which prevents convenient to the Earth by the solar eclipse cause.
Benefits of the sun
• Sun has a function that is very important for the earth. Energy beam sun was still warm, make the earth for life, making air and water in the earth bersirkulasi, plants can berfotosintesis, and many other things.
• It is a source of energy (heat rays). Energy contained in coal and oil also comes from the sun.
• Controls stability earth orbit, which also means to control the occurrence of the day and night, year and the other to control the planet. Without the sun, will be difficult to imagine that there is life on earth.
• Vaccines as alternative energy. Tuesday solar panels and solar energy to generate electricity.