Sun

The sun emits light to the earth's surface. During the day the sun was very hot. In this section we discussed on the temperature, composition and mass of the sun.

a. The sun's surface temperature is approximately 6,000 degrees C. That is why the surface of the sun blinding us. The more layers to the high increase in temperature. The center of the sun the temperature reaches 18 million degrees C. The temperature in the sun is uneven.

b. Sun's gravity is strong enough to bind the gas so it does not spread. The gravitational force is also to suppress the nuclear centers so there is an explosion.

c. Most of the body of the sun is composed of hydrogen gas. There was also a helium gas, a little nitrogen, oxygen and heavy elements like iron and nickel. The center of the sun every second of 600 million hydrogen is burned into helium through nuclear reactions. The sun as if it never runs out of power.

d. As it is known that the sun is very large. Its diameter is approximately 1,400,000 km. the distance of the sun from the earth so far, approximately 150 million kilometers.

e. Experts estimate the age of the sun is now about 4,600 million years. With the amount of hydrogen that has, the sun will still hold nuclear burning in its center as it is now over 5,000 million years.