- 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 minute and accurate observation. He said that it was the slight discrepancy between the actual position of Mars and its predicted position (eight minutes of arc) that pointed the road to a complete reformation of astronomy. Kepler himself harboured many Pythagorean, occult, and mystical beliefs, but his laws of planetary motion are the first mathematical, scientific, laws of astronomy of the modern era. They state (i) that the planets travel in elliptical orbits, with one focus of the ellipse being the sun; (ii) that the radius between sun and planet sweeps equal areas in equal times; and (iii) that the squares of the periods of revolution of any two planets are in the same ratio as the cube of their mean distances from the sun.

*Philosophy dictionary.
Academic.
2011.*

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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) 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… … Historical Dictionary of Renaissance**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**— (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