What is our sun?

http://www.youtube.com/watchv=x1w8hKTJ2Co&feature=related First of all watch his video because itl blow your mind, and make you think how small we really are.

We are actually very tiny in the universe, our sun which appears to be so big is actually also very small. Even though it is really small in comparison to all the things in the universe, it is relatively far, lets say that the sun was to completly shut off, we wouldnt see any change for eight minutes because thats how long it takes the light from the sun to get here. The sun is extremly hot, at the surface its 10,000 degrees farenheit and its about 27 million degrees farenheit at its core. The sun is composed of 75% hydrogen and 25% helium, its not very complicated. It works and makes the energy and light it provides by a thing called fusion, its where it takes a hydrogen and helium particle and fuses it together to produce light and energy. Fusion would be the best way to make energy on earth but we havent found out how to do it yet, all we can do is fission which splits an atom in half and produces energy but it emits bad radiation, fission takes place at nuclear stations. Once the sun runs out of gases to do fusion with, it will basicly turn off and imploded over the weight of its own gravity and in turn make a black hole, but that wont happen for at least 5 billion years. The sun isnt a very complicated thing but it is what makes life on earth possible because it provides us with heat, light, and energy which is hwat every living thing needs.