The Big Bang Theory explains what happened when our universe began and to explain what happend durring and after that moment. Our universe began 13.7 billion years ago. Edwin Hubble invented this theory. Edwin Hubble discovered The Big Bang Theory in 1929.
Most scientists are certain that the universe had a beginning. Galaxies appear to be moving away from and there speed is disproportional to there distance. the observation supports the expansion of the universe and that is was once compacted. If the universe was very hot we should be able to find remnant of this heat.
Sounds like you found a great article. I like the fact that you used the words "most astronomers."
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