One of the first visitors of the Haute-Provence Observatory was born on which year?
Margaret Burbidge Eleanor Margaret Burbidge ("née" Peachey), FRS (born August 12, 1919 in Davenport) is a British-born American astrophysicist, noted for original research and holding many administrative posts, including Director of the Royal Greenwich Observatory.
Jean Léonard Marie Poiseuille Jean Léonard Marie Poiseuille (] ; 22 April 1797 – 26 December 1869) was a French physicist and physiologist.