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Later, Johannes Kepler (1571- 1630) estimated the AU at 24 million kilometers (15 million miles).

'''Johannes Kepler''' (Weil der Stadt 1571 - Regensburg 1630) was an astronomer whose name liv Johannes Kepler is sometimes described as a somewhat muddleheaded mystic. Usually, one the

[[Johannes Kepler]] took considerable interest in the subject, and in his 1596 book, ''Myster

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...tions. His predictions were only improved, almost 15 centuries later, by [[Johannes Kepler]] (ca. 1610 AD), who used the [[heliocentric]] model of [[Nicolaus Copernic

...my]]’s geocentric (Earth-centered) view of the universe prevailed. Then, [[Johannes Kepler]] confirmed the observations a short time later.

...Tychonic system]]. From 1600 until his death in 1601, he was assisted by [[Johannes Kepler]], who would later use Tycho's astronomical information to develop his own ...ed to Tycho in an attempt to kill him and that the most likely suspect was Johannes Kepler.</ref>

...d.<ref>[http://turnbull.dcs.st-and.ac.uk/~history/Biographies/Kepler.html Johannes Kepler] (Website of the [[University of St. Andrews]], Scotland)</ref>

Orbit is an old noun introduced by [[Johannes Kepler]] in 1609 to describe the trajectories of the earth and the planets. The ''

...orbited the Earth, as in the Ptolemaic system. Brahe's younger colleague, Johannes Kepler (1571-1630), was educated as a Copernican by his teacher Maestlin and staye

...e Moreto y Cabaña|Moreto]]<td>[[Roger Bacon]]<td>[[Cosimo de Medici]]<td>[[Johannes Kepler|Kepler]]

...]] was the invisible force that many other natural philosophers, such as [[Johannes Kepler|Kepler]], seized upon, incorrectly, as governing the motions that they obse

...im) for uniform circular motion. This result of Huygens', together with [[Johannes Kepler|Kepler]]'s third law, gave rise to the formulation of the [[inverse-square

...ch that those who followed, including Nicholas Copernicus, Tycho Brahe and Johannes Kepler, worked to reform astronomy under his influence. ==[[Johannes Kepler]] (1571-1630)==

...tions were not much more accurate than those of [[Ptolemy]]. Only after [[Johannes Kepler]] had unchained himself from the medieval awe for [[Aristotle]], and assume

...in a sphere presses the surface of the sphere)--> from Keplers rule<ref>([[Johannes Kepler|Kepler]]'s third law) </ref> of the periodical times of the Planets being i

===[[Johannes Kepler]]=== Johannes Kepler (1571-1630) was instrumental in marrying the best observational data of the