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Johannes Kepler was a German astronomer and mathematician who lived between 1671-1630. Kepler was a Copernican and initially believed that planets must accompany perfectly circular orbits ("Johan Kepler" 1). During this time period, Ptolemy's geocentric theory of the solar system was accepted. Ptolemy's theory stated that Earth is at the center of the universe and stationary; closest to Earth is the Moon, and outside it, extending towards the outside, are Mercury, Venus, and the Sun in a straight line, followed by Mars, Jupiter, Saturn, and the "fixed stars". The Ptolemaic system clarified the numerous observed motions of the planets as using small spherical orbits known as epicycles ("Astronomy" 2). Kepler is famous for introducing three powerful, applicable and valid laws of planetary movement by making use of the precise data he'd acquired from Tycho Brahe, a Danish astronomer, that helped Copernicus's theory of the solar system profit international reception ("Johan Kepler" 1). Nevertheless, he had made additional effective contributions in the area of astronomy, which are valid to society and so were used to change how the universe was perceived. Johannes Kepler moved to Prague at 1600 where he worked as an assistant for Tycho Brahe, and eventually as the imperial mathematician into Rudolf II. Brahe allowed Kepler to observe no more than a division of the capacious records. Brahe appointed Kepler the task of knowing the orbit of this planet Mars, that was mostly hard. Ironically, it was specifically the Martian information that permitted Kepler to invent the right laws of planetary movement. Kepler was obliged finally into the understanding that the orbits of these planets weren't the circles maintained by Aristotle and supposed indirec...