Tuesday, November 22, 2011

Final 1

The Earth is the thrid planet form our sun. Our solar system is on one of the outer arms of the milky way, our galaxy. These are in comparisoin tiny objects in comparison to the univers. Which is around 14 billion light years across. In comparison the milky way is only 12 million light years across. The soloar system is 1 light hour across and the Earth, the Earth is not even a light second across.
 The Universe is around 14 billion years old. The theroy that most scientist agree with is that the universe started off with a bang. This is called the big bang and it is what got everything going. Before the big bang, nothing exsited, or so many scientist think. The universe is moving at a speed that acording to physics is imposible. The universe is expanding at a speed that is greater than that of light, which is supposed to be impossible. When the big bang happend all of the matter that now exsicts was created. Giving the building blocks of the universe a place to go.

Stars are the building blocks of all elements. When stars create heat they use nuccler fusion, slaming other elements together to create newer elements. As the stars get older they start fussing heaveir and heavier elements together. When these larger elements hit iron they process ends. If the star is large enough the start will go into a supernova. When this happens more elements are created from the heat of the explosion. This is how we get the natural elements found on earth.



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