Philosophiæ Naturalis Principia Mathematica facts for kids
(Redirected from Philosophiae Naturalis Principia Mathematica)The Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy) is a trilogy, written by Isaac Newton and published on 5 July 1687. The threebook work describes physics and mathematics. It states Newton's laws of motion and the derivation of Kepler's Laws, and observations on gravity.
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Sir Isaac Newton (1643–1727) author of the Principia

Nicolaus Copernicus (1473–1543) formulated a heliocentric (or Suncentered) model of the universe

Artist's impression of English polymath Robert Hooke (1635–1703).

Newton's proof of Kepler's second law, as described in the book. If a continuous centripetal force (red arrow) is considered on the planet during its orbit, the area of the triangles defined by the path of the planet will be the same. This is true for any fixed time interval. When the interval tends to zero, the force can be considered instantaneous. (Click image for a detailed description).