Isaac Newton's "Principia" Is First Published
First published on 5 July 1687, Philosophiae Naturalis Principia Mathematica (or, the "Mathematical Principles of Natural Philosophy") was a series of three books by English alchemist, astronomer, mathematician, philosopher, physicist, and theologian Sir Isaac Newton; likely the most influential scientist of all time, and a key player in the Scientific Revolution that transformed our understanding of the cosmos in the 16th and 17th centuries.
The Principia—as it is usually abbreviated—is all about the laws of motion. In the preface Newton wrote, "We offer this work as mathematical principles of philosophy. For all the difficulty of philosophy seems to consist in this—from the phenomena of motions to investigate the forces of nature, and then from these forces to demonstrate the other phenomena." Over the three volumes he explained, for the first time ever, his three laws of motion and the universal law of gravitation, and these defined scientific studies of the physical universe for the subsequent three centuries.
Newton's universal law of gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them; this is important as it shows that objects on Earth and objects in space are both ruled by the same set of natural laws, which was a critical breakthrough. Then Newton lays out his three laws of motion: that the velocity of a body remains constant unless the body is acted upon by an external force; that the acceleration of a body is parallel and directly proportional to the net force and inversely proportional to the mass; and that the mutual forces of action and reaction between two bodies are equal, opposite and collinear.
Isaac Newton was well informed by the amazing thinkers that started the Scientific Revolution; specifically Nicolaus Copernicus and Johannes Kepler's discoveries in astronomy, Galileo Galilei's studies of dynamics, and Rene Descartes's philosophical enquiries. He finished the first book of Philosophiae Naturalis Principia Mathematica in the spring of 1686, and presented it to the Royal Society whose President, Samuel Pepys, licensed it for publication soon afterwards.
However, as the Royal Society had already spent all of its printing funds on Francis Willughby's De Historia Piscium (or, "The History of Fishes"), the book was actually paid for by the Astronomer Royal, Edmond Halley, of Halley's Comet fame. It was a wise move, as Philosophiae Naturalis Principia Mathematica is still regarded as one of the most important scientific publications of all time.
The Principia—as it is usually abbreviated—is all about the laws of motion. In the preface Newton wrote, "We offer this work as mathematical principles of philosophy. For all the difficulty of philosophy seems to consist in this—from the phenomena of motions to investigate the forces of nature, and then from these forces to demonstrate the other phenomena." Over the three volumes he explained, for the first time ever, his three laws of motion and the universal law of gravitation, and these defined scientific studies of the physical universe for the subsequent three centuries.
Newton's universal law of gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them; this is important as it shows that objects on Earth and objects in space are both ruled by the same set of natural laws, which was a critical breakthrough. Then Newton lays out his three laws of motion: that the velocity of a body remains constant unless the body is acted upon by an external force; that the acceleration of a body is parallel and directly proportional to the net force and inversely proportional to the mass; and that the mutual forces of action and reaction between two bodies are equal, opposite and collinear.
Isaac Newton was well informed by the amazing thinkers that started the Scientific Revolution; specifically Nicolaus Copernicus and Johannes Kepler's discoveries in astronomy, Galileo Galilei's studies of dynamics, and Rene Descartes's philosophical enquiries. He finished the first book of Philosophiae Naturalis Principia Mathematica in the spring of 1686, and presented it to the Royal Society whose President, Samuel Pepys, licensed it for publication soon afterwards.
However, as the Royal Society had already spent all of its printing funds on Francis Willughby's De Historia Piscium (or, "The History of Fishes"), the book was actually paid for by the Astronomer Royal, Edmond Halley, of Halley's Comet fame. It was a wise move, as Philosophiae Naturalis Principia Mathematica is still regarded as one of the most important scientific publications of all time.
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