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The Theory of General Relativity and The Expansion of the Universe: Albert Einstein and Edwin Hubble

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Over many centuries, there has been a great deal of controversy over the ultimate fate of the universe. It began in the early 1900’s with Albert Einstein’s theory that General relativity could be used to inform us about the universe which would also inform us on how the universe would end. Russian Physicist, Alexander Friedman, was the first to believe that universe was expanding from initial singularity which is also known as the Big Bang. After Edwin Hubble stated his observation on the universe’s expansion in 1931, the end of the universe has been a subject that many scientist have investigated. In the late 1920’s before Edwin Hubble’s statement about his observation- to which after Einstein heard about the statement, Albert Einstein admitted that his cosmological constant was a stupid and careless mistake. George Lemaitre, Belgium astronomer and physics professor, voiced his theory which is famously known all around the world as the Big Bang Theory as the origin, or the beginning of the universe. The Big Bang Theory became the most highly acceptable theory of how the universe came to be thanks to the discovery by Robert Wilson and Arno Penzias in 1965.
Another important element that contributes to the fate of the universe is the Density Parameter, which is the average matter of density over the value of that density. That would then give you either one of the three geometries which are the flat, open and closed universe, and respectively. Cosmotologist determines that

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