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Willem de Sitter
(redirected from De Sitter)

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Sitter, Willem de 

Born May 6, 1872, in Sneek; died Nov. 19, 1934, in Leiden. Dutch astronomer.

De Sitter graduated from the University of Groningen. In 1897 he began work in photometry at the observatory on the Cape of Good Hope, where he developed a theory for the motion of the first four satellites of Jupiter. In 1908 he became a professor of astronomy and in 1919, director of the observatory of the University of Leiden. De Sitter created his own fundamental system of astronomical and geodetic constants. His works on the theory of relativity served as an impetus for the organization of an expedition to observe the solar eclipse of 1919. It was during this eclipse that the deviation of light rays passing near the sun was detected, a phenomenon that had been predicted by Einstein.

WORKS

“The Expanding Universe.” Bulletin of the Astronomical Institutes of the Netherlands, 1930, vol. 5.

REFERENCE

“Willem de Sitter.” Monthly Notices of the Royal Astronomical Society, 1935, vol. 95, no. 4.


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Rendezvous for Dinner Chuck Byers &Tom Berki de Sitter Publications 1288 Ritson Road North, Suite 417, Oshawa, ON L1G 8B2, Canada c/o ISBS 920 NE 58th Avenue, Suite 300, Portland, OR 97213-3786 1897160186 $19.
Their topics include branes and stability, geometric transitions, non-Kahler geometries and string vacua, the K-theory of smooth DM stacks, Gromov-Witten, Gopakumar-Vafa and Donaldson-thomas invariants of Calabi-Yau threefolds, flux compactification geometries and de Sitter vacua in M-theory, N=4 super Yang-mills-theory and integrable spin chains, Yang-Mills amplitures from twistor string theory, and notes on correlation functions in (0,2) theories.
Cautioning his colleagues not to go overboard in their enthusiasm, Peebles recalled the words of a cosmologist of an earlier era, Willem de Sitter, who admonished in 1931 that "it should not be forgotten that all this talk about the universe involves a tremendous extrapolation, which is a very dangerous operation.
 
 
 
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