Study of the sun according to Cosmology

The sun is what defines the solar system . For planet Earth belongs to the Milky Way - the way of milk to the Greeks and the solar system , which is the Earth and other planets , as well as the sun belongs to the solar system .

The sun is the source of light and heat , and is the nearest star to us , and there are other suns in the universe , as the star Aldebaran which is two hundred times larger than the sun .

The sun is a giant ball of glowing gas and core happens to generate energy through thermo- nuclear reactions .

Although the sun appears big and bright, its brightness is approximately 200 billion times that of the star Sirius , which is considered the brightest star in the night sky. But compared the many stars in the universe , the sun is merely ordinary star :

Its mass is denoted by M = 1.989 X 10 ( 10 to the power of 10 ) kg .

The radius of the sun is R = 696,000 km and the core temperature reaches Tc = 10,000,000 K. The main compositions of the sun.

The main chemical compositions are Hydrogen , occupying the largest percentage of mass of the star , with 91.2 % . Helium with 8.7% and carbon , with smaller mass of 0.043 % .

Another interesting and extensive study in astronomy and cosmology factor is the findings on the brightness of the sun, which is equivalent to 3.9 x 10 ( to the power of 26 ) watts = 3.9 x 10 ( raised to the power of 33 ) ergs / s . To produce this astronomical energy charge, we would need the equivalent to burning 2 x10 ( raised to the power 20 ) gallons of gasoline per minute or more than 10 million times the annual production of oil from the earth .

Since the nineteenth century , astronomers and physicists know that energy can not be generated by combustion for energy this way would keep the sun shining for only 10,000 years .

The sun has the ability to turn 600 million tons of hydrogen into helium per second .

It is believed that in 1.1 billion years the sun's glare will increase by about 10 % , which will cause the temperature increase on earth and will cause evaporation of the seas . In 3.5 billion years , the sun's glare will increase to 40 % , the heat is so high , that the oceans will dry completely. But the gradual loss of the sun to deplete this energy source , mainly hydrogen , occur , away from the earth to the orbit of Mars and its temperature is equivalent to 1,327 degrees celsius .

The mass loss transform the sun into a " white dwarf " and the land shall be approximately 1.85 AU away .

Von Guilherme Campelo