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            Breakthroughs in Astronomy and Medicine in the 16th and 17th Centuries.
             It was during the 16th and 17th centuries when man's view of the unvierse and himself.
             changed drastically. This came after a millenium of repetition and stagnation in the.
             development of science. People finally began questioning what they were told, and they.
             went out to find proof rather than assuming on the basis of authority and common sense. .
             These advances in astronomy and medicine came about in the same era, and were not.
             unparallel in their development. In both fields were some very notable people who.
             contributed greatly to the devolopment in these areas. In the field of astronomy.
             Copernicus, Brahe, Kepler, and Galileo shed Aristotle's, Plato's, and Ptolemy's views of.
             the universe. In medicine Paraclesus, Vesalius, and Harvey did away with Galen's.
             ancient practices.
             Ancient Greeks believed that the Earth was stationary, they concluded this by.
             making some basic obsevations. One being that the Earth cannot be part of the 'heavens'.
             because celestial bodies are bright points of light, whereas the Earth is a nonluminous.
             sphere of mud and rock. Also in the heavens there is very little change, the same stars are.
             there night after night, only five planets, the sun, and the moon. On Earth however things.
             are constantly changing and reforming. Their senses also told them that the Earth wasn't.
             moving. They believed that the air, the clouds, and the birds would all be left behind if.
             the Earth spinning around, therefore it couldn't be moving. Also if the Earth were.
             spinning everything would fly off due to the centrifugal force. It was thought that with.
             all this evidence there was no way that the Earth could be moving.
             There were however a few descrepencies in this Earth stationary or geocentric.
             view. The most apparent being the five planets. They moved unlike anything else, they.
             moved contrary to the stars and occasionaly went backwards.

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