It is the expansion of a singularity that formed the universe. It created everything: Time, Space, and the Matter (atoms) that make up everything The Big Bang is the birth of the universe 13.7 billion years ago.
Everything was compressed into a tiny spec. It suddenly expanded very rapidly and was very hot.
As it expanded it cooled and matter began to form by sticking together.
Eventually the matter clumped together into nebula clouds
Then gravity helped pull the matter in to make stars and galaxies.
Some of these stars died out & blew up. From the debris new stars and planets formed like our solar system.
The universe continues to expand, stretching space and time b/t the galaxies.
A brief writing break to watch this video review Expansion of the Universe film http://www.youtube.com/watch?v=th_9ZR2I0_w
Edwin Hubble used a very powerful telescope to see: 1.The Milky Way is NOT the only galaxy 2.Galaxies are moving away from each other (if they are moving away now then at some point they must have been closer-George Lemaitre) What proof do we have for the Big Bang?
http://www.youtube.com/watch?v=kV33t8U6w28 Video-What is the Universe expanding into?
3. Leftover radiation fills all of space (space is now cold, 3K) 4. The amount of Hydrogen & Helium found in the universe matches predictions.
The Universe is like Raisin Bread Interview with Noble prize winner Dr. Adam Reiss http://www.telegraph.co.uk/science/ 8807068/Universe-like-raisin- bread-says-Nobel-prize- winner.html Video of rising raisin bread http://www.youtube.com/ watch?v=0z8hrRXQuHY http://www.youtube.com/ watch?v=L8DgU07fjYk