Origins: The Big Bang Theory

The Big Bang Theory is a scientific theory about the origin of the universe. According to the theory, the universe was created from a big bang sometime between 10 billion and 20 billion years ago that shot energy and matter and in all directions. http://www.aboutbigbang.com/results.asp?nSector=1&cSector=Theory

In 1927, the Belgian priest Georges Lemaître proposed that the universe began with the explosion of a primeval atom. His proposal came after observing the red shift in distant nebulas by astronomers to a model of the universe based on relativity. Later, Edwin Hubble found experimental evidence to help justify Lemaître's theory. He found that distant galaxies in every direction are going away from us with speeds proportional to their distance.
Doppler Effect explains this observation.
The theory also predicts the existence of cosmic background radiation (the glow left over from the explosion itself). The Big Bang Theory received its strongest confirmation when this radiation was discovered in 1964 by Arno Penzias and Robert Wilson, who later won the Nobel Prize for this discovery.

1) a protouniverse with infinite energy and none of the familiar laws of physics bursts open and expands to the size of a grapefruit in 10/-43 S

2) 10-23 S  after a "lumpy" beginning some energy is squeezed into primitive matter called Quarks                                                            E=MC2

3) 10-13 S the sudden cooling permits quarks to condense into electrons protons and some neutrons light does not shine yet

4) 3 minutes 10,000,000C* >the universe is expanding more slowly but is still to hot for subatomic particles to assemble into atoms

5) 300,000Y  10,000c* > the universe is cool enough to form the only early elements H and He from protons, neutrons, and  electrons.  H  He

6) 1 billion Y  -200C* gravity causes H +He to coalesce into large clouds that further clump to form galaxies and then really clump to form stars
- the massive force of ravity created by the huge mass of the star causes fusion reactions to ignite the nuclear conversion of H -> He with the subsequent release of energy typical of a star

7)  15 billion Y - 270 C* After some stars age they will implode and "Super Nova" the pressure on the simple H + He atoms results in the formation of heavier elements such as carbon oxygen iron silicon that will eventually form the basic building blocks of planetary masses and the resulting life that begins to evolve on at least Earth.

Earth and the other planets as well as all life forms are remnants of stars
 Life began to evolve about 3 billion years ago on earth perhpas earlier on other planets

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