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Mathematical Principles of Natural Philosophy (Principia)

1687 · by Isaac Newton

The laws of motion and universal gravitation.

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Introduction

Newton’s main work appeared in Latin in London in 1687; Edmond Halley persuaded him to write it and paid for the printing. It is organised like a geometry book, with definitions, three laws of motion and propositions. Book I treats motion under forces in empty space, Book II motion in resisting media, which undermines Descartes’s theory of vortices. Book III, “The System of the World”, derives universal gravitation and explains with it the orbits of planets and comets, the motion of the moon and the tides. The second edition (1713) added the General Scholium, with the remark “I frame no hypotheses” about the cause of gravity.

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