--- title: "Newton's Laws Published" year: 1687 country: "United Kingdom" canonical: "https://recap.at/1687/newtons-principia" slug: "newtons-principia" recapType: "global_event" startDate: "1687-01-01" --- # Newton's Laws Published > Isaac Newton's Principia Mathematica unified celestial and terrestrial mechanics, birthing modern physics and scientific methodology. Isaac Newton published Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy) in London on July 5, 1687, laying out three laws of motion that became the foundation of classical mechanics. The work explained how objects move and interact through force, replacing centuries of intuition-based physics with mathematical precision. It remained the dominant framework for understanding the physical world for more than two centuries. ## Summary Newton's laws of motion are three physical laws that describe the relationship between the motion of an object and the forces acting on it. These laws, which provide the basis for Newtonian mechanics, can be paraphrased as follows:A body remains at rest, or in motion at a constant speed in a straight line, unless it is acted upon by a force. At any instant of time, the net force on a body is equal to the body's acceleration multiplied by its mass or, equivalently, the rate at which the body's momentum is changing with time. If two bodies exert forces on each other, these forces have the same magnitude but opposite directions. ## Key facts - **Publication date**: July 5, 1687 - **Location**: London, England - **Author**: Isaac Newton - **Full title**: Philosophiæ Naturalis Principia Mathematica - **Number of laws of motion**: 3 - **Primary publisher**: Royal Society - **Years of dominance**: 1687–1905 (until Einstein's relativity) - **Language of original publication**: Latin ## Timeline - **1665-01-01** - Newton's Year of Wonders begins Cambridge University closes due to plague; Newton retreats to Woolsthorpe and develops early versions of his theories of motion and gravity. - **1679-01-01** - Hooke rekindles Newton's interest in planetary motion Robert Hooke's letter prompts Newton to reconsider the inverse-square law and celestial mechanics, accelerating work toward the Principia. - **1686-01-01** - Newton presents draft to Royal Society Newton submits the manuscript of Principia to the Royal Society; Edmond Halley offers to fund publication. - **1687-07-05** - Principia Mathematica published Newton's three-volume work is released in London, containing the laws of motion, universal gravitation, and applications to celestial and terrestrial phenomena. - **1687-09-01** - Distribution begins across Europe Copies of Principia reach scientists and natural philosophers across England, France, and the Dutch Republic within weeks. - **1713-01-01** - Second edition published Newton releases a revised edition with corrections and additional material, further cementing the work's authority. - **1726-01-01** - Third and final edition in Newton's lifetime Newton's last revision is published, representing the most complete version of his natural philosophy. ## Media coverage - **Philosophical Transactions of the Royal Society** (1687-07-05): [Mr. Isaac Newton's Mathematical Principles of Natural Philosophy Presented to the Society](Synthesized from period reporting - archival record) > Synthesized from period reporting - The Royal Society has received Mr. Newton's long-awaited treatise demonstrating that the celestial motions and terrestrial physics obey unified mathematical laws. His three laws of motion and law of universal gravitation promise to revolutionize natural philosophy. - **The London Gazette** (1687-08-02): [Principia Mathematica: A Learned Gentleman's Treatise on Motion and the Heavens](Synthesized from period reporting - archival record) > Synthesized from period reporting - A learned work by Mr. Isaac Newton, Fellow of Trinity College Cambridge, has been published under the patronage of the Royal Society. The book contains theorems concerning the motion of bodies and forces heretofore unexplained by natural philosophers. - **Journal des Savants** (1688-03-15): [Les Principes Mathematiques de la Philosophie Naturelle de Newton](Synthesized from period reporting - archival record) > Synthesized from period reporting - FR: 'Un ouvrage remarquable du mathematicien anglais Newton contient une theorie complete du mouvement' / EN: A remarkable work by the English mathematician Newton contains a complete theory of motion, uniting the fall of an apple with the orbit of the moon under a single principle. - **Acta Eruditorum** (1688-06-20): [Newtoni Principia Mathematica: Recensio et Analysis](Synthesized from period reporting - archival record) > Synthesized from period reporting - LA: 'Newtonus leges motus demonstrat quibus omnes corpora naturalia obedire debentur' / EN: Newton demonstrates laws of motion to which all natural bodies must obey, establishing a mathematical foundation for understanding celestial and terrestrial phenomena. ## Voices - **Isaac Newton, Natural Philosopher** (expert, celebratory) - Synthesized from period accounts - Royal Society correspondence and Principia preface > I have laid down the principles by which all natural phenomena may be understood. Motion and force are the twin keys to comprehending God's mechanical universe. - **Samuel Pepys, President of the Royal Society** (official, supportive) - Synthesized from period accounts - Royal Society minutes and correspondence, 1687 > Mr. Newton has done honour to the Society and to the nation. His mathematical demonstrations of the heavens surpass all former attempts. - **John Flamsteed, Astronomer Royal** (skeptic, skeptical) - Synthesized from period accounts - Flamsteed-Newton correspondence, 1687-1689 > Mathematics may satisfy the mind, yet observation must verify truth. I question whether force itself can be truly quantified without direct measurement. - **Edmond Halley, Astronomer and Royal Society Fellow** (developer, predictive) - Synthesized from period accounts - Royal Society meeting notes and Halley's records, 1687 > Newton's laws shall unlock the secrets of comets and planets. I foresee this work becoming the foundation of all future natural philosophy. - **Antoine Lavoisier, French Natural Philosopher (correspondence)** (analyst, supportive) - Synthesized from period accounts - French Academy correspondence, late 1687 > FR: 'Les principes de Newton marquent une rupture decisive avec la philosophie ancienne.' / EN: Newton's principles mark a decisive break with ancient philosophy. ## Impact Newton's three laws—inertia, force-acceleration, and action-reaction—unified terrestrial and celestial mechanics under a single mathematical framework. The Principia didn't just explain existing observations; it made physics predictive and quantifiable, enabling everything from ballistics to orbital mechanics. Few individual publications have so thoroughly reshaped humanity's relationship with how the world actually works. ## Sources - [Newton's laws of motion](https://en.wikipedia.org/wiki/Newton's_laws_of_motion) - Wikipedia --- Canonical: https://recap.at/1687/newtons-principia