Parents

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David Gill research assistant 1897-1899 Royal Observatory at Cape of Good Hope (Astronomy Tree)
 (https://mathshistory.st-andrews.ac.uk/Biographies/Sitter/)
Jacobus Cornelis Kapteyn grad student 1901 RUG
 (Discussion of heliometer observations of Jupiter's satellites)

Children

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Gerard P. Kuiper research assistant 1933 Leiden
Adriaan Blaauw research assistant 1946 Leiden
Jan Woltjer grad student 1918 Leiden (Astronomy Tree)
Willem Hendrik van den Bos grad student 1925 Leiden
Dirk Brouwer grad student 1927 Leiden
Simon C. van Veen grad student 1927 Leiden
BETA: Related publications

Publications

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De Sitter W, D. F. F. (1934) Pays-Bas Bulletin GéOdéSique. 44: 312-313
De Sitter W. (1933) Early astronomy and the Observatory of Leyden Nature. 132: 771-772
Einstein A, de Sitter W. (1932) On the Relation between the Expansion and the Mean Density of the Universe. Proceedings of the National Academy of Sciences of the United States of America. 18: 213-4
DE SITTER W. (1931) Contributions to a British Association Discussion on the Evolution of the Universe Nature. 128: 706-709
de Sitter W. (1931) Das sich ausdehnende Universum Die Naturwissenschaften. 19: 365-369
de Sitter W. (1930) ON THE DISTANCES AND RADIAL VELOCITIES OF EXTRA-GALACTIC NEBULAE, AND THE EXPLANATION OF THE LATTER BY THE RELATIVITY THEORY OF INERTIA. Proceedings of the National Academy of Sciences of the United States of America. 16: 474-88
De Sitter W. (1928) On the rotation of the earth and astronomical time Nature. 121: 99-106
De Sitter W. (1923) Problems of fundamental astronomy Nature. 112: 147-148
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