21. MSN Encarta - Search Results - Sitter Willem De Encarta Search results for sitter willem de . Page 1 of 1. de Klerk 7. Magazineand news articles about sitter willem de *. Encarta Magazine Center. http://encarta.msn.com/Sitter_Willem_de.html

MSN Home My MSN Hotmail Shopping ... Money Web Search: logoImg('http://sc.msn.com'); Encarta Subscriber Sign In Help Home ... Upgrade to Encarta Premium Search Encarta Encarta Search results for "Sitter Willem de" Page of 1 Exclusively for MSN Encarta Premium Subscribers Sitter, Willem de Article—Encarta Encyclopedia Sitter, Willem de (1872-1934), Dutch mathematician, physicist, and astronomer. De Sitter is best known for his studies of the structure of the... related items Einstein’s equations model of the universe relativity Willem de Kooning Article—Encarta Encyclopedia de Kooning, Willem (1904-1997), Dutch-born American painter, whose work is characterized by energetic brush strokes and twisted forms, and by an... Willem de Vlamingh Article—Encarta Encyclopedia Found in the Hartog, Dirk article Willem de Kooning Picture—Encarta Encyclopedia Picture from Encarta Encyclopedia Willem de Kooning Picture—Encarta Encyclopedia Picture from Encarta Encyclopedia De Klerk, Frederik Willem Article—Encarta Encyclopedia De Klerk, F(rederik) W(illem)

22. Sitter, Willem De sitter, willem de (18721934). Dutch astronomer, mathematician, andphysicist, who contributed to the birth of modern cosmology. http://www.cartage.org.lb/en/themes/Biographies/MainBiographies/S/Sitter/1.html

Sitter, Willem de Dutch astronomer, mathematician, and physicist, who contributed to the birth of modern cosmology. He was influential in English-speaking countries in bringing the relevance of the general theory of relativity to the attention of astronomers. De Sitter was born in Sneek, Friesland, and studied at the University of Groningen and the Royal Observatory, Cape Town, South Africa. He was professor of theoretical astronomy at the University of Leiden from 1908 as well as director of its observatory from 1919. In 1911 de Sitter outlined how the motion of the constituent bodies of our Solar System might be expected to deviate from predictions based on Newtonian dynamics if Albert Einstein 's special relativity theory were valid. After the publication of Einstein's general theory of relativity 1915, de Sitter expanded his ideas and introduced the 'de Sitter universe' (as distinct from the 'Einstein universe'). His model later formed an element in the theoretical basis for the steady-state hypothesis regarding the creation of the universe. He presented further models of a nonstatic universe: he described both an expanding universe and an oscillating one.

23. Sitter, Willem De. The Columbia Encyclopedia, Sixth Edition. 2001 2001. sitter, willem de. (v l´ md s t´ r) (KEY) , 1872–1934, Dutchastronomer and mathematician. He was professor from 1908 at the Univ. http://www.bartleby.com/65/si/Sitter-W.html

Select Search All Bartleby.com All Reference Columbia Encyclopedia World History Encyclopedia Cultural Literacy World Factbook Columbia Gazetteer American Heritage Coll. Dictionary Roget's Thesauri Roget's II: Thesaurus Roget's Int'l Thesaurus Quotations Bartlett's Quotations Columbia Quotations Simpson's Quotations Respectfully Quoted English Usage Modern Usage American English Fowler's King's English Strunk's Style Mencken's Language Cambridge History The King James Bible Oxford Shakespeare Gray's Anatomy Farmer's Cookbook Post's Etiquette Bulfinch's Mythology Frazer's Golden Bough All Verse Anthologies Dickinson, E. Eliot, T.S. Frost, R. Hopkins, G.M. Keats, J. Lawrence, D.H. Masters, E.L. Sandburg, C. Sassoon, S. Whitman, W. Wordsworth, W. Yeats, W.B. All Nonfiction Harvard Classics American Essays Einstein's Relativity Grant, U.S. Roosevelt, T. Wells's History Presidential Inaugurals All Fiction Shelf of Fiction Ghost Stories Short Stories Shaw, G.B. Stein, G. Stevenson, R.L. Wells, H.G. Reference Columbia Encyclopedia PREVIOUS NEXT ... BIBLIOGRAPHIC RECORD The Columbia Encyclopedia, Sixth Edition. Sitter, Willem de

24. De Sitter, Willem. The Columbia Encyclopedia, Sixth Edition. 2001 2001. de sitter, willem. see sitter, willem de. The Columbia Encyclopedia,Sixth Edition. Copyright © 2003 Columbia University Press. http://www.bartleby.com/65/x-/X-DeSitter.html

Select Search All Bartleby.com All Reference Columbia Encyclopedia World History Encyclopedia Cultural Literacy World Factbook Columbia Gazetteer American Heritage Coll. Dictionary Roget's Thesauri Roget's II: Thesaurus Roget's Int'l Thesaurus Quotations Bartlett's Quotations Columbia Quotations Simpson's Quotations Respectfully Quoted English Usage Modern Usage American English Fowler's King's English Strunk's Style Mencken's Language Cambridge History The King James Bible Oxford Shakespeare Gray's Anatomy Farmer's Cookbook Post's Etiquette Bulfinch's Mythology Frazer's Golden Bough All Verse Anthologies Dickinson, E. Eliot, T.S. Frost, R. Hopkins, G.M. Keats, J. Lawrence, D.H. Masters, E.L. Sandburg, C. Sassoon, S. Whitman, W. Wordsworth, W. Yeats, W.B. All Nonfiction Harvard Classics American Essays Einstein's Relativity Grant, U.S. Roosevelt, T. Wells's History Presidential Inaugurals All Fiction Shelf of Fiction Ghost Stories Short Stories Shaw, G.B. Stein, G. Stevenson, R.L. Wells, H.G. Reference Columbia Encyclopedia PREVIOUS NEXT ... BIBLIOGRAPHIC RECORD The Columbia Encyclopedia, Sixth Edition. De Sitter, Willem

25. De Sitter, Willem (1872-1934) -- From Eric Weisstein's World Of Scientific Biogr Alphabetical Index. About this site. Branch of Science , Astronomers v. Branchof Science , Physicists v. Nationality , Dutch v. de sitter, willem (18721934), http://scienceworld.wolfram.com/biography/deSitter.html

Branch of Science Astronomers Branch of Science Physicists ... Dutch de Sitter, Willem (1872-1934) Dutch astronomer who developed a cosmological model in 1917 based on the assumptions of homogeneity and isotropy, the two assumptions of Einstein's model. His model assumed an expanding universe (in agreement with the Hubble law ), unlike Einstein's static model, and assumed that the matter density was zero. This model is now called the Einstein-de Sitter cosmological model Einstein Hubble Additional biographies: Bruce Medalists Bonn

26. Fauth Translate this page willem de sitter (1872-1934),. zu Sneek in den Niederlanden geboren,wurde 1908 Professor für Astronomie an der Universität Leyden. http://home.t-online.de/home/m.holl/sitter.htm

Willem de Sitter (1872-1934), Erst durch Hubbles Entdeckung der Fluchtgeschwindigkeit der Galaxien gewannen de Sitters Theorien erneut an Bedeutung, da sie Hubble erst dazu anregten, den verschiedenen direkten Hinweisen zur Expansion des Weltalls nachzugehen. Weitere Arbeitsgebiete de Sitters waren die Theorie der Bewegung der Jupitermonde und die Schwankungen in der Rotationszeit der Erde.

27. Biografia De Sitter, Willem De Translate this page sitter, willem de. (Sneek, 1872-Leiden, 1934) Astrónomo neerlandés.En clara oposición a la concepción del universo estático http://www.biografiasyvidas.com/biografia/s/sitter.htm

Inicio Buscador Utilidades Recomendar sitio Enlaces Sitter, Willem de (Sneek, 1872-Leiden, 1934) Astrónomo neerlandés. En clara oposición a la concepción del universo estático, defendida inicialmente por Einstein, logró demostrar que el modelo de un universo isótropo y homogéneo puede conciliarse con la observación del corrimiento de las rayas del espectro. En 1932 estableció un modelo cosmológico en colaboración con A. Einstein. De 1925 a 1928 fue presidente de la Unión Astronómica Internacional. Inicio Buscador Recomendar sitio

28. Sitter willem de sitter. Born willem de sitter studied mathematics at Groningenand then joined the Groningen astronomical laboratory. He http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Sitter.html

Willem de Sitter Born: 6 May 1872 in Sneek, Netherlands Died: 20 Nov 1934 in Leiden, Netherlands Click the picture above to see three larger pictures Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Willem De Sitter studied mathematics at Groningen and then joined the Groningen astronomical laboratory. He worked at the Cape Observatory in South Africa (1897-99) then, in 1908, de Sitter was appointed to the chair of astronomy at Leiden. From 1919 he was director of the Leiden Observatory. In 1913 de Sitter produced an argument based on observations of double star systems which proved that the velocity of light was independent of the velocity of the source. It put to rest attempts which had been made up until this time to find emission theories of light which depended on the velocity of the source but were not in conflict with experimental evidence. De Sitter corresponded with Ehrenfest in 1916, and he proposed that a four- dimensional space- time would fit in with cosmological models based on general relativity. He published a series of papers (1916-17) on the astronomical consequences of Einstein 's general theory of relativity. He found solutions to

29. S Index Simplicius (933) Simpson, Thomas (263*) Simson, Robert (1914*) Sina, ibn (Avicenna)(438*) Sinan ibn Thabit (719) Sintsov, Dmitrii (223*) sitter, willem de (483 http://www-gap.dcs.st-and.ac.uk/~history/Indexes/S.html

Names beginning with S The number of words in the biography is given in brackets. A * indicates that there is a portrait. Saccheri , Giovanni (212) Sacrobosco , Johannes de (328*) St-Venant Saint-Vincent , Gregorius (296*) Saks , Stanislaw (1132*) Salaciense , Pedro Nunes (332*) Salem Salmon , George (1351*) Samarqandi , Shams al (202) Samawal , Ibn al (1569) Samoilenko , Anatoly (252*) Sang , Edward (471*) Sankara , Narayana (724) Sargent , Winifred (1339) Sasaki , Shigeo (1066*) Saunderson , Nicholas (1869*) Saurin , Joseph (210) Savage , Leonard (299*) Savart , Felix (106) Savary Savasorda (A bar Hiyya) (641) Savile , Sir Henry (1130*) Schafer , Alice (1344*) Schatten , Robert (682) Schauder , Juliusz (1012*) , Henry (844*) Scheffers , Georg (143*) Schickard , Wilhelm (219*) , Ludwig (191*) , Oscar (49*) Schmidt , Erhard (1382*) Schoenberg , Isaac (816*) , Arthur (370*) Schooten , Frans van (259*) Schottky , Friedrich (251*) Schoute , Pieter (363) Schouten , Jan (341*) Schreier , Otto (582*) , Ernst (174*) , Erwin (2585*) Schroeter , Heinrich (182*) Schubert , Hermann (101*) Schur , Issai (1667*) Schwartz , Laurent (1119*) Schwarz, Herman

30. Âèëëåì äå Ñèòòåð (Willem De Sitter) The summary for this Russian page contains characters that cannot be correctly displayed in this language/character set. http://www.peoples.ru/science/astronomy/de_sitter/

a a b c ... z English German French Beartrap - Security Appliance SmartFunction.com - Dedicated Web Hosting SmartForex.com - Currency Trading (Forex) ÑÈÒÒÅÐ, ÂÈËËÅÌ ÄÅ (Sitter, Willem de) (1872–1934), íèäåðëàíäñêèé àñòðîíîì. Ðîäèëñÿ 6 ìàÿ 1872 â Ñíåêå. Îêîí÷èë ðîíèíãåíñêèé óíèâåðñèòåò, ðàáîòàë â àñòðîíîìè÷åñêîé ëàáîðàòîðèè. Ïîñëå äâóõ ëåò ðàáîòû ìàòåìàòèêîì-âû÷èñëèòåëåì íà îáñåðâàòîðèè ìûñà Äîáðîé Íàäåæäû (1897–1899) ñòàë àññèñòåíòîì Àñòðîíîìè÷åñêîé ëàáîðàòîðèè â ðîíèíãåíå, à â 1908 – ïðîôåññîðîì àñòðîíîìèè Ëåéäåíñêîãî óíèâåðñèòåòà. Ñ 1919 Ñèòòåð – äèðåêòîð Ëåéäåíñêîé îáñåðâàòîðèè. Àäðåñ (e-mail)(*): Îáðàòíûé àäðåñ (e-mail): Artension X-WILD MagNet D'Art studio ... Forex Links

31. De Sitter, Willem de sitter, willem de sitter, willem see sitter, willem de. The Columbia ElectronicEncyclopedia, 6th ed. Copyright © 2003, Columbia University Press. http://www.factmonster.com/ce6/people/A0912498.html

Encyclopedia De Sitter, Willem: De Sitter, Willem: see Sitter, Willem de The Columbia Electronic Encyclopedia, design desktop publishing Print this page Cite this page AD AD AD ADS Link to Fact Monster Add Fact Monster search to your site ... Privacy Brought to you by:

32. Einstein Archives Online - Contents Of Folder 20-8(b) Translate this page Get full record from archival database, 20-531.00, 06/22/1916, Einstein, Albert,sitter, willem de, Get publication information for item (The Collected Papers of http://www.alberteinstein.info/db/ViewFolder.do?folder=20-8(b)

33. Einstein Archives Online - Contents Of Folder 21-8 Translate this page Albert, Schlesinger, F, Get full record from archival database, 21-497.00,09/04/1933, Einstein, Albert, sitter, willem de, Get full record http://www.alberteinstein.info/db/ViewFolder.do?folder=21-8

34. WILLEM DE SITTER président de la cour à Arnhem aux Pays-Bas. Il fait ses http://clubastronomie.free.fr/histoire/willem_de_sitter.htm

WILLEM DE SITTER Willem de Sitter est le fils d'un juge, président de la cour à Arnhem aux Pays-Bas. Il fait ses premières années d'études dans cette ville. Il s'inscrit plus tard à l'Université de Groningen, en physique mathématique, où il prépare un doctorat. De 1897 à 1899, il travaille à l'Observatoire royal de Capetown, en Afrique du Sud, avec David Gill. Puis, il revient à Groningen où il travaille avec Kapteyn jusqu'en 1908. Cette années-là, il est nommé professeur à l'Université de Leiden et, de 1919 jusqu'à sa mort, il sera directeur de l'Observatoire de Leiden.

35. De Sitter sitter, willem de. (18721934). Nemecký astronom, který v roce 1917oznámil nový kosmologický model, založený na predpokladech http://www.aldebaran.cz/famous/people/Sitter_Willem_de.html

Sitter, Willem de Nìmecký astronom, který v roce 1917 oznámil nový kosmologický model, založený na pøedpokladech, že Vesmír je expandující podle Hubblova zákona (nikoli statický, jak pøedpokládaly Einsteinovy modely) a hustota hmoty byla v poèátcích nulová. Tento model se nazývá Einstein de Sitterùv kosmologický model.

36. Biografía De Willem De Sitter Translate this page willem de sitter, Nacido el 06 mayo Países Bajos. willem de sitter estudiómatemáticas y astronomía en Groningen. Paralelamente, entre http://www.astrocosmo.cl/biografi/b-w_sitter.htm

37. National Academy Of Sciences - Deceased Member de sitter, willem. Date of Birth May 6, 1872. Electedto NAS 1929. Date of death November 21, 1934. http://www4.nationalacademies.org/nas/nasdece.nsf/(urllinks)/NAS-58MVCN?opendocu

38. National Academy Of Sciences de Giorgi, Ennio. de la ValleePoussin, C. de Lacaze-Duthiers, Henri. de sitter,willem. de Valois, Russell L. de Vaucouleurs, Gerard. de Vries, Hugo. de Wit, CT. http://www4.nationalacademies.org/nas/nasdece.nsf/urllinks/$$AlphaListD?OpenDocu

39. MSN Encarta - De Sitter, Willem Translate this page Dans ce cas, connectez-vous en cliquant sur le lien Aller sur MSN Encarta Premium(ci-dessus). de sitter, willem. Plus de résultats pour de sitter, willem, http://fr.encarta.msn.com/encyclopedia_741533825/De_Sitter_Willem.html

Accueil MSN Mon MSN Hotmail Rechercher ... S'abonner   Encarta Premium Rechercher Article accessible sur abonnement MSN Encarta Premium : Acc©dez   30 000 articles encyclop©diques avec plus de 12 000 illustrations, un atlas mondial interactif, un guide du Web et une palette compl¨te de ressources et d'outils ©ducatifs. 34,99 € par an (service d’acc¨s   Internet non compris). En savoir plus. Cet article n'est accessible que si vous ªtes abonn©   MSN Encarta Premium. Dans ce cas, connectez-vous en cliquant sur le lien Aller sur MSN Encarta Premium (ci-dessus). De Sitter, Willem De Sitter, Willem (1872-1934), math©maticien, physicien et astronome n©erlandais, principalement connu pour ses recherches sur la structure de l’... Encarta vous int©resse ? Abonnez-vous d¨s maintenant et b©n©ficiez de : Plus de 30 000 articles 2 000 analyses d'oeuvre Plus de 12 000 m©dias (dont des extraits sonores, des vid©os et des m©dias interactifs) Un atlas mondial interactif Une palette compl¨te de ressources et d'outils ©ducatifs Un guide du Web Plus de r©sultats pour De Sitter, Willem

40. Willem De Sitter Translate this page willem de sitter (1872 - 1934). Astrónomo neerlardés. Tras doctorarse fue nombradoprofesor de astronomía de la Universidad de Leyden en el año 1908. http://es.geocities.com/fisicas/cientificos/astronomos/sitter.htm

Willem de Sitter (1872 - 1934) http://es.geocities.com/fisicas/ Los autores: e fisicas@yahoo.es

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