death_date death_place birth_place image_size nationality field birth_date known_for image article_title name alma_mater
20 november 1934 leiden sneek 150px dutch physics 6 may 1872 de sitter universe desitter.jpg willem de sitter
 willem de sitter groningen university
willem de sitter

willem de sitter -lrb- 6 may 1872 -- 20 november 1934 -rrb- was a dutch mathematician , physicist and astronomer .
