Ismaël Bullialdus

Ismaël Boulliau was a 17th-century French astronomer and mathematician who was also interested in history, theology, classical studies, and philology. He was an active member of the Republic of Letters, an intellectual community that exchanged ideas. An early defender of the ideas of Copernicus, Kepler and Galileo, Ismael Bullialdus has been called "the most noted astronomer of his generation". One of his books is Astronomia Philolaica (1645).

28 September 1605

Born on the same birth day (28 September): Aivar Rehemaa • Augustus FitzRoy, 3rd Duke of Grafton • Ben Edmondson • Florent Schmitt • Jeremy Isaacs • John Scott (rugby union) • Kenny Kirkland • Koko Taylor • Marlon Parmer • Miguel Ortiz Berrocal • Nick St. Nicholas • Ray Emery • Sheikh Hasina • Stuart Clark

Born in the same month (September 1605): Francesco Sacrati • William Dugdale