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Willem de Sitter studied mathematics at Groningen University and then joined the Groningen astronomical laboratory. He worked at the Cape Observatory in South Africa ( 1897- 1899) then, in 1908, de Sitter was appointed to the chair of astronomy at Leiden University. From 1919Events January January 1 Edsel Ford succeeds his father as head of the Ford Motor Company January 5 Spartacist uprising Socialist demonstrations in Berlin turn into attempted communist revolution with Spartacist League in the forefront January 9 Spartacus he was director of the Leiden Observatory.
De Sitter contributed to our concept of the universe. One of his accomplishments was to have co-authored a paper with Albert EinsteinAlbert Einstein ( March 14 1879 April 18 1955) was a theoretical physicist who is widely regarded as the greatest scientist of the 20th century. He proposed the theory of relativity and also made major contributions to the development of quantum mechanics in 19321932 is the leap year starting on Friday. see link for calendar) Events January-February January 3 British arrest and intern Mohandas Gandhi and Vallabhbhai Patel January 8 In Britain the Archbishop of Canterbury forbids church remarriage of divorcees Jan in which they argued that there might be large amounts of matter which does not emit light, now commonly referred to as dark matterDark matter is matter that can't be detected by its emitted radiation but whose presence can be inferred from gravitational effects on visible matter such as stars and galaxies. Estimates of the amount of matter in the universe based on gravitational effe.
He won the James Craig Watson MedalThe James Craig Watson Medal was established by the bequest of James Craig Watson, and is awarded by the US National Academy of Sciences for contributions to astronomy. The recipients have been: See also List of prizes Prizes named after people External l in 1929Centuries: 19th century 20th century 21st century Decades: 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s Years: 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 See also 1929 in aviation 1929 in film 1929 in literature 1929 in mu and the Bruce MedalThe Catherine Wolfe Bruce gold medal is awarded every year by the Astronomical Society of the Pacific for outstanding lifetime contributions to astronomy. See also Past laureates are: 1898 Simon Newcomb 1899 Arthur Auwers 1900 David Gill 1902 Giovanni V. in 1931, as well as the Gold Medal of the Royal Astronomical Society in that same year.
A crater on the Moon is named for him, as is the asteroid 1686 De Sitter .