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The Big Bang Theory The big bang theory is the most widely accepted theory to the beginning of the universe You may ask then what was there before the big bang Well it is believed that The big bang explosion did not occur in space it created space Before the big bang neither space nor time nor matter existed they were all created in the big bang Parker 69 Approximately 10 to 20 billion years ago the big bang occurred and scientists can trace back to 10 to the negative 43 seconds after the big bang but no closer This is because before this moment the idea of gravity is no longer constant Dense gas particles were expelled from the big bang which expanded at an incredible rate and then began to cool These clouds of gas particles began to break up after millions of years Eventually these smaller clouds collapsed and formed galaxies Albert Einstein developed the general theory of relativity in 1915 These mathematical equations are the basis for the big bang theory After seven years a man named Alexander Friedmann developed solutions to Einsteins equations and provided the background for the majority of the theory At first Einstein thought that the universe was static or not moving but an American astronomer Edwin Hubble found that the galaxies were actually speeding away from each other He found that the galaxies father away were moving away faster showing that the universe is expanding uniformly However the universes initial state is still unknown Microsoft Encarta Encyclopedia 99 He discovered that the galaxies were moving away from each other because the light from these galaxies were shifted towards the red end of the spectrum A stars light may be shifted or moved on the spectrum of color due to
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