What Keeps the Sun Shining?
Posted 02 July 2007 - 08:37 PM
The Sun is really a star. In fact, it is the nearest star to the Earth. Life as we know it depends on the Sun. Years ago, scientists believed that the reason the Sun shone, or gave off light and heat, was that it was burning. But the Sun has been hot for hundreds of millions of years, and nothing could remain burning for that long.
Today scientists believe that the heat of the Sun is the result of a process similar to what takes place inside an atom bomb. The Sun changes matter into energy. This is different from burning. Burning changes matter from one form to another. But when matter is changed into energy, very little matter is needed to produce a tremendous amount of energy. One ounce of matter could produce enough energy to melt more than a million tons of rock. So, if science is correct, the sun keeps shining because it is constantly changing matter into energy.
Posted 04 August 2007 - 04:45 PM
- The distance from Earth to the Sun is about 93,000,000 miles or 149,668,992 kilometers and the Earth is 1,300,000 smaller than the Sun?
- The Sun is so hot that it's temperature is about 11,000 degrees Fahrenheit or 6,093 degrees Celsius.
- The Sun is not a solid planet like Earth... it is made of gas, that's why scientists believe that the heat of the Sun is the result of a process similar to what takes place inside an atom bomb, like Rimbaud said above.
Posted 06 August 2007 - 06:31 AM
The estimated life of our Sun is about 10 billion years. Now it's approximately 5 billion yrs old.
Posted 02 September 2007 - 05:25 PM
The Sun orbits the center of the Milky Way galaxy at a distance of approximately 26,000 light-years from the galactic center, completing one revolution in about 225–250 million years. The orbital speed is 217 km/s (135 mi/s), equivalent to one light-year every 1,400 years.
Posted 24 December 2008 - 06:00 PM