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Word Count: 1,182
In modern day astronomy and the study of the universe individuals usually come up with predictions and then gather information and data in order to prove or disprove their hypothesis Other astronomers in the history of astronomy did the same and came up with their own conclusions based on the data they collected Some of their predictions were correct and some were way off but for the most part they progressed the study of the universe to the point where society is today Astronomers such as Ptolemy Copernicus Brahe Todays astronomers are making giant steps in the discoveries of new theories and proving or disproving their thoughts all with the help of foundations set by past astronomersPtolemy created the first geocentric model of the solar system that stood in place for over a thousand years The thought of placing the Earth in the center of the universe made perfect sense for several reasons The first reason was that the inhabitants of the Earth felt as if they were standing still and not rotating or revolving around any object Because of the fact that the idea of an atmosphere was not thought of until the future this was a very good explanation that could not be argued Another explanation of the Earth being the center of the solar system is that parallaxes involved with the stars showed that the Earth was not moving because technology at the time could not pick up the extremely small increments of movement by the Earth Ptolemy also discovered epicycles which explained retrograde motion Ptolemy could predict where the planets were going to be even hundreds of years after he died proving the accurate nature of his maps There were several problems with Ptolemys calculations and maps His principles were based entirely of mathematics and had nothing to do with physical principles Math was the only thing that he used to predict and explain his theories something which caused a tremendous
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