Parents

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Jacobus Cornelis Kapteyn grad student 1901 RUG
 (Discussion of heliometer observations of Jupiter's satellites)

Children

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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
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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) 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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