Family background and early interest in astronomy (Elis Stromgren).
Education at Ecole normale supérieure, Paris; survival during German Occupation, and gathering of astronomers at Haute Provence Observatory; work i
Discussion of Oort's family background and childhood interest in astronomy.
Early home life in Indiana, and early schooling. Origins of his interest in astronomy and the influence of both family and teachers.
Early life and family in Amsterdam; childhood interest in astronomy and telescope-building; undergraduate at Rijksuniversiteit te Leiden (W.