What is Philosophiæ Naturalis Principia Mathematica?
{{italictitle}} [[File:NewtonsPrincipia.jpg|thumb|Newton's copy of the ''Philosophiæ Naturalis Principia Mathematica'']] [[File:Newton&#039;s Annotated copy of his Principia Mathematica.jpg|thumb|Newton's own copy of the first edition. He wrote on it the changes he wanted to make for the second edition]] The '''''Philosophiæ Naturalis Principia Mathematica''''' ([[English language|English]]: ''Mathematical Principles of Natural Philosophy'') is a [[trilogy]], written by [[Isaac Newton]] and published on 5 July 1687. The three-book work describes [[physics]] and [[mathematics]]. It states [[Newton's laws of motion]] and the derivation of [[Kepler's Laws]], and observations on [[gravity]]. {{-}} {{math-stub}} {{authority control}} [[Category:17th-century books]] [[Category:Mathematics books]] [[Category:Physics]] [[Category:1680s works]]