Ismael Bullialdus

From Biocrawler, the free encyclopedia.

Ismael Bullialdus (Boulliaud, Boulliau) (September 28, 1605 - November 25, 1694) was a French astronomer. He was born in Loudun, Vienne, France.

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.)

Ismael Bullialdus died in Paris, France.

External links

• Short biography (http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Boulliau.html)
• Longer biography (http://web.clas.ufl.edu/users/rhatch/pages/11-ResearchProjects/boulliau/bio-historical/06-b-michaud-1843-etc.htm) (in French)

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Ismael_Bullialdus (http://en.wikipedia.org/wiki/Ismael_Bullialdus) version history (http://en.wikipedia.org/w/index.php?title=Ismael_Bullialdus&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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