The Principia is "justly regarded as one of the most important works in the history of science". This Latin edition of Mathematical Principles of Natural Philosophy, often referred to simply as Principia, is a work in three books by Sir Isaac Newton, first published on July 5, 1687. Principia declares Newton's laws of motion, also forming the basis of Newton's classic mechanical law of universal gravitation and a derivation of Kepler's laws of planetary motion (which Kepler first obtained empirically). **This edition includes The System of The World (De Mundi Systemate).
