What is the meaning of willem de sitter?

noun

  • Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934. ).
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). willem de sitter. Retrieved September 24, 2026, from http://smartdefine.org/willem_de_sitter/definitions/1320879
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