Final Exam # 2

The solar system we know is located in the outer reaches of the Milky Way galaxy.(1) The Milky Way galaxy is approximentally 100,000 light years long and in center it is 3,ooo light years tall.(1) The age of the Milky Way is about 4.6 billion years old.(1) The big bang theory is the effort to explain how and when the universe was formed. The think that the universe was formed about 13.5 million years ago.(2) The microwave radiation gave f electrons that are still floating in space(2). They find out how old the electrons are, then they could find out the exact age of the universe.(2) The dust and gas creates brighter and new stars that we see every year.(2) The heat balances the gravity of each star in the galaxy because of the outward force it has on the stars.(3) This will help us in the future because it will show us eventually how the galaxy was formed and when it was.









Sources: (1) Our Solar System
www.enchantedlearning.com
NASA

(2)Big Bang Theory
www.big-bang-theory.com
All About Science Inc.

(3) Life Cycle of Stars
www.thinkquest.org
Thinkquest