⏰ when
When was Newton's law of universal gravitation first published?
Quick Answer
It was first published in 1687, in Isaac Newton's Principia.
The Full Story
Isaac Newton first published the law of universal gravitation in 1687 in Philosophiæ Naturalis Principia Mathematica, usually called the Principia. In it, he argued that the same force governs both falling objects on Earth and the motion of the Moon and planets. The law was revolutionary because it unified celestial and terrestrial physics with one mathematical idea. It became one of the foundations of classical mechanics.
Key Facts
1.Published in 1687
2.Appeared in the Principia
3.Unified Earth and celestial motion
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"The moment gravity became a universal law."
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