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When was Isaac Newton’s Principia published?
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Edmond Halley
Edmond Halley, detail of an oil painting by Richard Phillips, c. 1720; in the National Portrait Gallery, London.
Isaac Newton’s Philosophiae Naturalis Principia Mathematica, commonly known as the Principia, was published in 1687.123
The publication of this work was significantly aided by the British scientist Edmond Halley. After encouraging Newton to expand his studies on celestial mechanics, Halley took on the responsibility of overseeing the project, which included editing the text, correcting proofs, and financing the printing at his own expense.4