Willem de Sitter

(redirected from Desitter)
Also found in: Dictionary, Thesaurus.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.


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


“Willem de Sitter.” Monthly Notices of the Royal Astronomical Society, 1935, vol. 95, no. 4.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The Comet Line, which had liberated 1,000 Allied airmen, was infiltrated by Prosper Desitter. Comet Line leader Frederic de Jongh and 215 others were shot, and Dedee, de Jongh's young daughter who had personally made 39 trips over the Pyrenees with evaders, spent the rest of the war in a concentration camp.
Globally, space-time is likely to be closer to a DeSitter space-time than the Minkowski space-time used in the limiting behaviour here.