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Philosophiae Naturalis Principia Mathematica Published (1687) Options
Posted: Saturday, July 5, 2014 12:00:00 AM
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Philosophiae Naturalis Principia Mathematica Published (1687)

Newton's Principia represents one of the greatest milestones in the history of science and marked the beginning of the modern period of mechanics and astronomy. The text includes Newton's three famous laws of motion, treatises on dynamics and fluid motion, the unification of terrestrial and celestial mechanics under the principle of gravitation, and an explanation of Kepler's laws of planetary motion. Principia grew out of Newton's correspondence with what famous astronomer? More...
Posted: Saturday, July 5, 2014 5:25:49 AM

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With Halley.
"The first of the three constituent books was sent to Halley for the printer in spring 1686, and the other two books somewhat later. The complete work, published by Halley at his own financial risk, appeared in July 1687. Newton had also communicated De motu to Flamsteed, and during the period of composition he exchanged a few letters with Flamsteed about observational data on the planets, eventually acknowledging Flamsteed's contributions in the published version of the Principia of 1687."
Posted: Saturday, July 5, 2014 12:56:47 PM

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"Halley the man orbits forever in the shadow of the unmatched Newton, but he was a gifted, original, versatile and productive scientist, and a human being as adventuresome, generous, loving and sweet as Newton was retiring, cold, solitary and austere."

Encouragement of Newton

Yet they became colleagues. It was Halley who encouraged the retiring Newton to write down the principles of gravitation he had developed after years of thought supposedly inspired by the legendary falling apple. Newton recognized that gravity on Earth represented the same law of force as that affecting the motion of planets around the Sun. Halley edited the manuscript and arranged financing for publication in 1687 of Newton's great book, ''The Mathematical Principles of Natural Philosophy.''

Halley's encouragement of Newton was perhaps his greatest contribution to science, according to Alan Cook, a professor of natural philosophy at Cambridge University in England. But in applying Newton's laws of gravitation in making his comet prediction, Halley went an important step further. His correct prediction turned out to be the first direct confirmation of Newton's theories.
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