Ismael Bullialdus
Ismael Bullialdus (Boulliaud, Boulliau) (September 28, 1605 - November 25, 1694) was a French astronomer. He was born in Loudun, Vienne, France.
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September 28 - 1605 - November 25 - 1694 - French - Astronomer - Loudun - Vienne
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In 1640, he suggested that the force of gravity follows an inverse-square law. (Isaac Newton made this idea precise in his 1687 work, the Principia.)
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1640 - Gravity - Inverse-square law - Isaac Newton - Principia
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Ismael Bullialdus died in Paris, France.
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