One of the first visitors of the Haute-Provence Observatory was born on which year?
Haute-Provence Observatory:  Foreign observers first used the observatory in 1949, when Geoffrey and Margaret Burbidge visited. 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.
1919