Editing Celestial mechanics (section)

===Laws of planetary motion===
{{For|detailed treatments of how his laws of planetary motion can be used|Kepler's laws of planetary motion|Kepler problem}}

[[Johannes Kepler]] was the first to closely integrate the predictive geometrical astronomy, which had been dominant from [[Ptolemy]] in the 2nd&nbsp;century to [[Copernicus]], with physical concepts to produce a [[Astronomia nova|''New Astronomy, Based upon Causes, or Celestial Physics'']] in 1609. His work led to the [[Kepler's laws of planetary motion|laws of planetary orbits]], which he developed using his physical principles and the [[planet]]ary observations made by [[Tycho Brahe]]. Kepler's elliptical model greatly improved the accuracy of predictions of planetary motion, years before Newton developed his [[Newton's law of universal gravitation|law of gravitation]] in 1686.