When Did Isaac Newton Discover Gravity?

By Staff WriterLast Updated Mar 25, 2020 11:34:56 AM ET
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Isaac Newton first published on gravity in "Principia Mathematica," which was released in July, 1687. A section of "Principia Mathematica" called "Discourse concerning Gravity and its Properties," was read to the Royal Society on April 21, 1686, in preparation for the publication of the book.