Big Bang Theory Essay

1404 WordsFeb 2, 20146 Pages
History of the Big Bang Theory The Big Bang theory states that all the matter that is in the universe was once in a very small amount of space with infinite temperature, pressure, and density. This theory is well supported and there are many reasons for its support. One main reason is that no one really has a clue and The Big Bang Theory seems farfetched but more reasonable than any other ideas that there are out there. Some of the important thing to know about the big bang to understand are the beginning and the few seconds immediately after the actually bang. Also what generally has happened since the then? It is important to know theories of how it will end as well, and to get a well-rounded opinion, I feel it useful to have some of the other possibilities outlined. The best place to start is the beginning. One of the things that cosmologists are not yet sure about is the Big Bang itself. It is not yet possible to give a definitive answer to the questions: what was the Big Bang and why did it happen? The strength of the Big Bang theory lies in the evidence for it, not the method used to explain it. Actually, the theory has been revised a great deal since its first proposition and is probably not exactly as you think it is. I'll explain it in the order of historical development. The theory was first proposed in the 1930s, based on Edwin Hubble's discovery that distant galaxies are receding. Hubble measured the distances to a large number of galaxies, based on the observed brightness of certain stars within them, and compared these distances with their electromagnetic spectra. As it turned out, more distant galaxies had the features in their spectra shifted to lower frequencies in a linear manner: that is, more distant galaxies exhibit greater redshifts. The only known mechanism for generating a spectral shift is the Doppler Effect, which means that distant

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