In short
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.
How it unfolded.
The five-minute version
What actually happened.
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.
As it was happening
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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.
Voices from this moment (1)
Newton's Year of Wonders begins
Jan 1
“Cambridge University closes due to plague; Newton retreats…”
As it was happening
16 voices, 22279 days.
Day 0 · January 1, 1665
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.
“Cambridge University closes due to plague; Newton retreats…”
- Newton's Year of Wonders begins, Jan 1
Day 5113 · January 1, 1679
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.
“Robert Hooke's letter prompts Newton to reconsider the…”
- Hooke rekindles Newton's interest in planetary motion, Jan 1
Day 7670 · January 1, 1686
Newton presents draft to Royal Society
Newton submits the manuscript of Principia to the Royal Society; Edmond Halley offers to fund publication.
“Mr.…”
- Synthesized from period accounts - Royal Society minutes and correspondence, 1687, Jun 20
“Newton submits the manuscript of Principia to the Royal…”
- Newton presents draft to Royal Society, Jan 1
Day 8220 · July 5, 1687
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.
“I have laid down the principles by which all natural…”
- Synthesized from period accounts - Royal Society correspondence and Principia preface, Jul 5
“Mr.…”
- Philosophical Transactions of the Royal Society, Jul 5
“Newton's laws shall unlock the secrets of comets and…”
- Synthesized from period accounts - Royal Society meeting notes and Halley's records, 1687, Jul 10
“Principia Mathematica: A Learned Gentleman's Treatise on…”
- The London Gazette, Aug 2
“Mathematics may satisfy the mind, yet observation must…”
- Synthesized from period accounts - Flamsteed-Newton correspondence, 1687-1689, Aug 15
“Newton's three-volume work is released in London,…”
- Principia Mathematica published, Jul 5
Day 8278 · September 1, 1687
Distribution begins across Europe
Copies of Principia reach scientists and natural philosophers across England, France, and the Dutch Republic within weeks.
“Les Principes Mathematiques de la Philosophie Naturelle de…”
- Journal des Savants, Mar 15
“Newtoni Principia Mathematica: Recensio et Analysis”
- Acta Eruditorum, Jun 20
“FR: 'Les principes de Newton marquent une rupture decisive…”
- Synthesized from period accounts - French Academy correspondence, late 1687, Dec 1
“Copies of Principia reach scientists and natural…”
- Distribution begins across Europe, Sep 1
Day 17531 · January 1, 1713
Second edition published
Newton releases a revised edition with corrections and additional material, further cementing the work's authority.
“Newton releases a revised edition with corrections and…”
- Second edition published, Jan 1
Day 22279 · January 1, 1726
Third and final edition in Newton's lifetime
Newton's last revision is published, representing the most complete version of his natural philosophy.
“Newton's last revision is published, representing the most…”
- Third and final edition in Newton's lifetime, Jan 1
Front pages.
3 outlets carried the story: Philosophical Transactions of the Royal Society, The London Gazette, Journal des Savants.
Media coverage
What the world was reading.
4 pieces, ranked by how much they shaped the discourse.
Philosophical Transactions of the Royal Society
Magazine · United Kingdom · Jul 5, 1687
"Mr. Isaac Newton's Mathematical Principles of Natural Philosophy Presented to the Society"
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.
- Mar 15, 1688
Journal des Savants
Magazine · France
"Les Principes Mathematiques de la Philosophie Naturelle de Newton"
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.
- Jun 20, 1688
Acta Eruditorum
Magazine · German States
"Newtoni Principia Mathematica: Recensio et Analysis"
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.
- Aug 2, 1687
The London Gazette
Newspaper · United Kingdom
"Principia Mathematica: A Learned Gentleman's Treatise on Motion and the Heavens"
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.
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