SUN

The sun is the nearest star to Earth with an average distance of 149,680,000 kilometers (93,026,724 miles). The sun and the eight planets fruit (which is known / discovered by humans) to form the Solar System. The sun is categorized as a small star of G.

The sun is a ball of incandescent gas, and it was not really round. The sun has equatorial and polar due to the rotational motion. Midline ekuatorialnya 864,000 miles, while the middle line between the poles 43 miles shorter. The Sun is a member of the Solar System greatest, because 98% of the mass of the Solar System accumulated in the sun.

In addition to the distribution center, the sun is also a central source of energy in the solar neighborhood. The sun consists of core and three layers of skin, each photosphere, and corona kromosfer. To continue to shine, the sun, which consists of hot gas exchange substances with the substance of hydrogen 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 at 4.6 billion years ago. Density is 1.41 solar masses versus mass of water. The number of solar energy reaching the Earth's surface that are recognized as the solar constant equals 1370 watts per square meter at any time. Sun-centered solar system is a second-generation star. Material from the sun formed from the explosion of the first generation of stars as believed by scientists, that the universe was formed by the big bang explosion about 14,000 million years ago.
Contents
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* 1 Distance sun to the Earth with scientific notation
* 2 Temperature
* 3 Turnover Sun
* 4 Prominensa
* Sun 5th Movement
* 6 The benefits of the sun
* 7 References
* 8 References

[edit] Distance of the sun to the Earth with scientific notation

Distance of the sun to the earth is 93,000,000 miles. This distance is used as an astronomical unit. One astronomical units (AU = Astronomical Unit) is 93 million miles = 148 million km. Compared with Earth, the diameter of the sun about 112 times the diameter of Earth. Solar gravity about 30 times the force of gravity. Sunlight through the 8 minutes to get to Earth and bright sunlight can cause anyone who looks at the sun continues to be blind.
[edit] Temperature

According to the calculations of experts, in the sun's surface temperature of about 6000 ° C but there is also a mention of the surface temperature of 5500 ° C. Rock type or any metal on Earth will melt at such high temperatures. The highest temperature is located in the center which is expected no less than 25 million degrees Celsius, but also noted that at its core temperature 15 million degrees Celsius. There is also a mention in the core temperature of about sun about 13,889,000 ° C. According to JR Meyer, heat comes from the sun falling meteor rocks at high speed on the surface of the sun. Meanwhile, according to the theory of Helmholz H contraction, the heat was coming from the shrinking of the gas ball. Another expert, Dr. Bothe said that the heat is derived from thermonuclear reactions are also called synthetic reaction of hydrogen helium.
[edit] Turnover Sun

Because the sun is not solid but rather in the form of plasma, causing more rapid rotation at the equator than the poles. Rotation on khatulistiwanya area is about 25 days and 35 days in the polar regions. Each round and has a gravitational 27.9 times Earth's gravity. There julangan very hot gas which can reach up to thousands and even millions of miles into space. A burst of sun 'sun flares' waves can interfere with communications such as radio, television and radar in the Earth and can damage satellites or space stations that are not protected. The sun also produces radio waves, ultra-violet waves, infra-red rays, X-rays and solar winds that spread to the entire solar system.

Earth sheltered than the solar wind by the Earth's magnetic field, while also protecting the ozone layer of Earth than the ultra-violet rays and infra-red rays. There were sunspots that appear from time to time in the sun caused by differences in the surface temperature of the sun. Sunspot area indicates that the "less hot" versus other regions and achieve breadth exceeds the size of Earth. At times the circulation of the Moon around the Earth blocking the light of the sun to the Earth, by the result of a solar eclipse.
[edit] Prominensa

Flames in the sun or also called a part of the sun Prominensa very big, bright, jutting out from the sun's surface, often shaped loop (round). Date 26-27 September 2009 and, spacecraft (STEREO A and STEREO B) a special monitor to record the phenomenon of the sun for 30 hours.

Prominensa occur in layers in the solar photosphere and move out into the corona of the sun. If the corona is the gases that have become very hot diionisasikan, called plasma, which did not show the light, plasma contains prominensa cooler.

Prominensa usually sticking to thousands of miles; the largest ever observed seen in 1997 with a length of around 350,000 miles - about 28 times the diameter of the earth. Mass in the material contained prominensa weighing up to 100 billion tons.
[edit] Movement Sun

The sun has two kinds of motion as follows:

* The rotation around its axis, length 25 1 / 2 days one-time round. Rotational movement can be demonstrated with visible black spots in the core which sometimes are to the right and approximately 2 weeks to be on the left.
* Moving between clusters, constellations. In addition to rotating, the sun among the constellations moving at the speed of 20 km per second, the movement around the center of the galaxy.

[edit] Benefits of the sun

* The sun has a very important function for the earth. Radiant energy of the sun has made the earth remains warm for life, making the air and circulating water in the earth, plants can berfotosintesis, and many other things.
* It is a source of energy (heat rays). The energy contained in coal and oil actually comes from the sun.
* Controlling the stability of the circulation of the earth which also means controlling the occurrence of day and night, year and control the other planets. Without the sun, it is hard to imagine that there will be life on earth.