Solar System 

Sun

I can say that sun is the center of the solar system, well it is the center of human’s life on earth.  It is huge, glowing, it provides light, heat and most of the energy on earth.  It is made up entirely of gas, and scientist call it plasma. Eight planets and their moons,  tens of thousands of asteroids, and gazillions of comets revolve around it.  And I would love to tell you a little information  (this information I got from The World Book Encyclopedia-2006 ed) about our sun.

The sun at a glance:

Distance from Earth: Shortest, about 147,100,000 kilometers; longest, about 152,100,000 kilometers; average, about 149,600,000 kilometers. Sunlight takes about eight minutes to reach Earth, travelling at 299,792 kilometers per second

Radius, distance from the sun’s center to its surface: About 695,500 kilometers, approximately 109 times the radius of Earth.

Volume: About 33 x 10¹⁶ cubic miles. This number would be written out as 33 followed by 16 zeroes. It is equivalent to 14 x 10¹⁷ kilometers and is 1,300,000 times the volume of Earth.

Mass, amount of mater. About 2 x 10²⁷ tons or metric tons. The sun’s mass makes up 99,8 percent of the mass of the solar system and is about 333,000 times as great as the mass of Earth.

Density: Average, about 1.4 grams per cubic centimeter, roughly 1,4 the density of water; core , about 100 times the density of water; radiative zone, about equal to the density of water; convection zone, about 1/10 the density of water.

Temperature: Surface, about 5800 kelvins or 5500^oC; core, more than 15 million kelvins or 15 million ^oC.

Age: about 4,600,000,000 years.

Chemical makeup: By mass, hydrogen, about 72 percent; helium, approximately 26 percent; other elements, roughly 2 percent. By number of atoms, hydrogen, about 94 percent; helium, about 6 percent; other elements, about 0,1 percent .

Luminosity, the rate at which the sun sends out energy: About  4 x 10²⁶ watts.

Solar constant, the amount of energy from the sun that arrives at the top of Earth’s atmosphere: About 1,370 watts per square meter.

Rotation period: About 25 days at the equator; about 28 days at higher latitudes.

Revolution period (in the Milky Way Galaxy): About 250 million years.

I hope you enjoy the little information.