KeplerAmong people skilled in almost every aspect of life, John Kepler was one of the few greats. Unlike many great thinkers of his era, he was not skeptical about writing down his findings in his correspondence and, in turn, having them published so as to receive full credit for his ideas. In Kepler's time there were no scientific journals in which to publish his discoveries. His work in developing the Laws of Planetary Motion surpasses all discoveries in celestial mechanics. This is not to mention the fact that he is credited with the origin of the word satellite and numerous records in the field of optics. Johannes Kepler was born in Weil der Stadt, Wuttenberg, on 27 December 1571. Wurttenberg was then part of the Holy Roman Empire, but its borders now lie in what is now Germany. He died on November 15, 1630 in Regensburg, also currently in Germany. Kepler was the first child born to a mercenary soldier and an innkeeper's daughter.# The same inn where Johannes stayed for much of his childhood after the age of five, when his father left the family to fight in the Netherlands . Kepler's early work at a nearby seminar brought him enough recognition to honor a scholarship at the University of Tübingen.1 It was there that he was first introduced to the ideas of Copernicus, which he immediately seemed to like very much. In one of his first published works, while earning his living as a mathematics teacher in Graz, he was the first to defend Copernicus and his Copernican system. The theory that the planets revolve around the sun and not the Earth was still refuted by some of the most prominent thinkers of the time. His school was undoubtedly Lutheran, which was also his family's religion, so the bond was strong. He held to the Augsburg Confession of Lutheranism, but refused to sign the Formula of Concord due to his disagreement with some of the values ​​listed therein.# This did not please those in authority, and Kepler was excluded from the sacrament in the Lutheran Church . During this period he also refused to convert to Catholicism, which left him with no side to take in the Thirty Years' War. This did not distract him from his faith and belief in God.