Ismael Bullialdus
Ismael Bullialdus
Ismael Bullialdus (Boulliaud, Boulliau) (September 28, 1605 - November 25, 1694) was a French astronomer.
Born in Loudun, Vienne, France.
In 1640, he suggested that gravitational force follows an inverse-square law.
He died in Paris, France.