# Kepler, Johannes

- (1571-1630)German mathematician and astronomer. His family relocated to the Protestant state of Württemberg while he was still a small child. This principality had developed a strong educational system, and young Kepler benefitted from a scholarship to an excellent Latin grammar school. He then entered the
**University**of Tübingen intending to become a minister, but he studied there with a mathematician who accepted the new heliocentric astronomical system of**Copernicus**. Kepler had not intended to focus on mathematics, but the university recommended him as a teacher of mathematics in a Protestant seminary in Graz, a predominantly Catholic city. His added duties as district mathematician required him to draw up**astrological**calendars.Kepler's first mathematical publication,*Mysterium cosmographicum*/*Secret of the Universe*(1596), suggested that the truth of Copernicus' system of astronomy was confirmed by his conclusion that the orbits of each of the planets in the Copernican system could be inscribed as tangents to one of the five geometrical solids of Euclidean geometry. The book attracted attention, and Kepler was invited to become an assistant to the Danish astronomer**Tycho Brahe**. Although Brahe opposed Copernicus' heliocentric theory and supported a compromise between it and the old Ptolemaic system, Kepler knew that Brahe had amassed a vast treasure of precise astronomical observations in his observatory and was eager to gain access to these important new data.When Brahe left Denmark to become court astronomer to the Emperor**Rudolf II**, Kepler returned to Graz but found that the**Habsburg**archduke was increasing pressure on local Protestants to turn Catholic. Hence he rejoined Brahe at Prague, where in 1601, following Brahe's death, he succeeded to the position of imperial mathematician. He continued to fulfill Brahe's official duty of compiling tables of the planetary orbits. By 1605 he had completed work on another major book,*Astronomía nova*/*The New Astronomy*, though publication was delayed until 1609. In this book Kepler demonstrated many complex relations among the planetary orbits. Many of these had no particular usefulness but two of them stated what are now known as Kepler's first two laws of planetary motion. In this book for the first time he abandoned his youthful belief that the force that moved the heavens was spiritual and attempted to derive all motions from purely material, physical forces.

*Historical Dictionary of Renaissance.
Charles G. Nauert.
2004.*

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**Kepler, Johannes**— born Dec. 27, 1571, Weil der Stadt, Württemberg died Nov. 15, 1630, Regensburg German astronomer. Born into a poor family, he received a scholarship to the University of Tübingen. He received an M.A. in 1594, after which he became a mathematics… … Universalium**KEPLER, Johannes**— (1571 1630) Employed as an astrologer by Habsburg emperors, Johannes Kepler is best remembered for his discovery of the elliptical orbits of the planets. He was relentless in pursuit of universal harmonies, and his magical conception of the… … Renaissance and Reformation 1500-1620: A Biographical Dictionary**Kepler , Johannes**— (1571–1630) German astronomer The grandfather of Kepler had been the local burgomaster but his father seems to have been a humble soldier away on military service for most of Kepler s early youth. His mother was described by Kepler as… … Scientists**Kepler, Johannes**— ► (1571 1630) Matemático y astrónomo alemán. En su estudio de las órbitas descritas por los planetas, adoptó la teoría de Copérnico, es decir, consideró que la Tierra giraba alrededor de su eje al mismo tiempo que se desplazaba en una órbita… … Enciclopedia Universal**Kepler, Johannes**— (or Keppler, 1571–1630) The founder of modern astronomy, Kepler was born near Stuttgart. It was as an assistant to the Danish astronomer Tycho Brahe (1546–1601) that he began his astronomical career, and from Tycho he derived his respect for… … Philosophy dictionary**Kepler, Johannes**— (1571 AD 1630 AD) This German astronomer and philosopher showed that the planets moved in elliptical orbits, not round ones as was previously believed. He formulated and certified the three laws of planetary motion, called Kepler s laws. They… … The writer's dictionary of science fiction, fantasy, horror and mythology**Kepler,Johannes**— Kep·ler (kĕpʹlər), Johannes. 1571 1630. German astronomer and mathematician. Considered the founder of modern astronomy, he formulated three laws to describe how the planets revolve around the sun. * * * … Universalium**KEPLER, Johannes**— (1571 1630) German ASTRONOMER who discovered the laws of planetary motion as a result of both observation and his BELIEF in MYSTICAL theories … Concise dictionary of Religion**Kepler, Johannes**— Keplero, Giovanni … Sinonimi e Contrari. Terza edizione**Kepler**— Kepler, Johannes … Philosophy dictionary