21. Sitter, Willem De --  Encyclopædia Britannica de sitter s model (from Cosmos) Encyclopædia BritannicaIt was also in 1917 that the Dutch astronomer willem de sitter recognized that he sitter, willem de Dutch mathematician, astronomer, and cosmologist who http://www.britannica.com/eb/article-9068024

Home Browse Newsletters Store ... Subscribe Already a member? Log in Content Related to this Topic This Article's Table of Contents Willem de Sitter Print this Table of Contents Shopping Price: USD $1495 Revised, updated, and still unrivaled. The Official Scrabble Players Dictionary (Hardcover) Price: USD $15.95 The Scrabble player's bible on sale! Save 30%. Merriam-Webster's Collegiate Dictionary Price: USD $19.95 Save big on America's best-selling dictionary. Discounted 38%! More Britannica products Sitter, Willem de  Encyclopædia Britannica Article Page 1 of 1 Willem de Sitter born May 6, 1872, Sneek, Neth. died Nov. 20, 1934, Leiden Dutch mathematician, astronomer, and cosmologist who developed theoretical models of the universe based on Albert Einstein's general theory of relativity. Sitter, Willem de... (75 of 279 words) var mm = [["Jan.","January"],["Feb.","February"],["Mar.","March"],["Apr.","April"],["May","May"],["June","June"],["July","July"],["Aug.","August"],["Sept.","September"],["Oct.","October"],["Nov.","November"],["Dec.","December"]]; To cite this page: MLA style: "Sitter, Willem de."

22. Willem De Sitter [Pictures And Photos Of] willem de sitter pictures, photos, photographs, images, physics history. http://www.aip.org/history/esva/catalog/esva/de Sitter_Willem.html

A larger image of any photo may be purchased. Click on an image to place an order. For more information visit our home page Arthur Stanley Eddington, Paul Ehrenfest, Albert Einstein, Hendrik Antoon Lorentz, Willem de Sitter Description Front row: Eddington and Lorentz; back row: Einstein, Ehrenfest and Sitter; Leiden ; suit Item ID Einstein D13 Henry Norris Russell, Harlow Shapley, Willem de Sitter Description suit; sitting; outdoors; table; ocean; Russell with others, relaxing on the deck of a ship. L-R Russell, unknown person, Shapley, Sitter Item ID Russell Henry Norris D2 Willem de Sitter Description old age, profile, beard, standing, blackboard Item ID Sitter Willem de B1

23. AIP Niels Bohr Library sitter, willem de. Subjects. Cosmology. Astronomy History. Browse Catalog.by author. sitter, willem de. by title. Kosmos a course of MARC Display http://www.aip.org/history/catalog/14352.html

If you are not immediately redirected, please click here My List - Help Browse Books Archival Resources Archival Finding Aids Photos Browse FAQs Past Searches History Home Search: Author Subject Title Journal/Newspaper Title Series Computer File (Software) Title Video Title Refine Search AIP Niels Bohr Library Item Information Holdings More by this author Sitter, Willem de. Subjects Cosmology. Astronomy History. Browse Catalog by author: Sitter, Willem de. by title: Kosmos : a course of... MARC Display Kosmos : a course of six lectures on the development of our insight into the structure of the universe, delivered for the Lowell institute in Boston, in November 1931 / by W. de Sitter. by Sitter, Willem de. Cambridge, MA : Harvard university press, 1932. 1932. Call Number: KF SIT (bb) z Description: xii, 138 p. : XII plates (incl. ill., port) ; 23 cm. Added Author: Lowell institute lectures, 1931. Copy/Holding information Location Collection Call No. Status Niels Bohr Library Books General Collection KF SIT (bb) In NBL Format: HTML Plain text Delimited Subject: Email to: Horizon Information Portal 3.0

24. Willem De Sitter: Definition And Much More From Answers.com Sit·ter ( sit ?r ) , willem de 1872–1934. Dutch astronomer noted for his workon cosmology and relativity. http://www.answers.com/topic/willem-de-sitter

showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Dictionary Encyclopedia WordNet Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping Willem de Sitter Dictionary Sit·ter sĭt ər Willem de Dutch astronomer noted for his work on cosmology and relativity. Encyclopedia Sitter, Willem de vĭl əm də sĭt ər ) , 1872–1934, Dutch astronomer and mathematician. He was professor from 1908 at the Univ. of Leiden and in 1919 became director of its observatory. His early work on the motions of Jupiter and its satellites contributed to the downfall of the pre-Einstein celestial mechanics. Using Einstein's formulation of relativity, he theorized that space cannot be in a stable equilibrium, and he concluded that the universe is expanding. He suggested a dynamic universe in which there is motion but no matter, in contrast to Einstein's static universe containing matter but no motion. In the combined Einstein–de Sitter model, the universe is expanding at a decreasing rate that approaches zero. De Sitter's works in English include Kosmos (1932) and The Astronomical Aspect of the Theory of Relativity WordNet Note: click on a word meaning below to see its connections and related words.

25. Sitter: Definition And Much More From Answers.com Mentioned In. sitter is mentioned in the following topics. de sitter space sitter, willem de (Dutch astronomer). fence sitter house sitter http://www.answers.com/topic/sitter

showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Dictionary WordNet Translations Mentioned In Or search: - The Web - Images - News - Blogs - Shopping sitter Dictionary sit·ter sÄ­t ər n. One that sits, especially: A person who cares for young children when the parents are not home; a babysitter. A person who poses or models, as for a portrait. A brooding hen. WordNet Note: click on a word meaning below to see its connections and related words. The noun sitter has 4 meanings: Meaning #1 an organism (person or animal) that sits Antonym: stander (meaning #1) Meaning #2 a person engaged to care for children when the parents are not home Synonyms: babysitter baby-sitter Meaning #3 a person who poses for a painter or sculptor Synonym: artist's model Meaning #4 a domestic hen ready to brood Synonyms: brood hen broody broody hen setting hen ... Translations Translations for: Sitter Nederlands (Dutch) oppas, model Fran§ais (French) mod¨le, baby-sitter Deutsch (German) n. - Modell, Babysitter, br¼tender Vogel

26. De Sitter, Willem (1872-1934) -- From Eric Weisstein's World Of Scientific Biogr de sitter, willem (18721934) and assumed that the matter density was zero.This model is now called the Einstein-de sitter cosmological model. 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

27. Willem De Sitter sitter, willem de, vil um du sit ur Pronunciation Key. sitter, willem de ,1872–1934, Dutch astronomer and mathematician. He was professor from 1908 at http://www.factmonster.com/ce6/people/A0845418.html

Home U.S. People Word Wise ... Homework Center Fact Monster Favorites 2006 TFK Almanac Quiz: Charlie and the Chocolate Factory SpongeBob Lemony Snicket ... Fantasy Books Reference Desk Atlas Almanacs Dictionary Encyclopedia ... Encyclopedia Sitter, Willem de u m d u u r] Pronunciation Key Sitter, Willem de Kosmos (1932) and The Astronomical Aspect of the Theory of Relativity The Columbia Electronic Encyclopedia, Page Tools: Cite Print See more Encyclopedia articles on: Astronomy: Biographies AD AD AD ADS Business Cards Link to Fact Monster Add Fact Monster search ... Privacy Brought to you by: Information Please

28. MSN Encarta - Search Results - Sitter Willem De Searched Encarta for sitter willem de Velde, van de paintings by willemvan de Velde the Younger (Rijksmuseum http://encarta.msn.com/Sitter_Willem_de.html

fdbkURL="/encnet/refpages/search.aspx?q=Sitter+Willem+de#bottom"; errmsg1="Please select a rating."; errmsg2="Please select a reason for your rating."; MSN Home My MSN Hotmail Shopping ... Sign In Web Search: Encarta Subscriber Sign In Help Home ... Upgrade your Encarta Experience Search Encarta Exclusively for MSN Encarta Premium Subscribers. Join Now Searched Encarta for ' Sitter Willem de' Articles Sitter, Willem de Sitter, Willem de (1872-1934), Dutch mathematician, physicist, and astronomer. De Sitter is best known for his studies of the structure of the... ... The island, which he named Dirk Hartog Island, sits on the western side of Shark Bay, southwest of present-day Carnarvon. Hartog spent three days... See all search results in Articles (180) Willem de Kooning Willem de Kooning de Kooning, Willem: picture of painting by de Kooning Velde, van de : paintings by Willem van de Velde the Younger ... Map of Da’an See all search results in Maps (250) Books about "Sitter Willem de" Search for books about your topic, "Sitter Willem de" Dictionary Encarta English-Spanish Dictionary ... Learn more. Go to Magazine Center Advertisement document.write('

29. MSN Encarta - Sitter, Willem De sitter, willem de (18721934), Dutch mathematician, physicist, and astronomer.de sitter is best known for his studies of the structure of the http://encarta.msn.com/encyclopedia_761589221/Sitter_Willem_de.html

MSN Home My MSN Hotmail Shopping ... Sign In Web Search: Encarta Subscriber Sign In Help Home ... Upgrade your Encarta Experience Search Encarta Subscription Article MSN Encarta Premium: Get this article, plus 60,000 other articles, an interactive atlas, dictionaries, thesaurus, articles from 100 leading magazines, homework tools, daily math help and more for $4.95/month or $29.95/year (plus applicable taxes.) Learn more. This article is exclusively available for MSN Encarta Premium Subscribers. Already a subscriber? Sign in above. Sitter, Willem de 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 3 items Want more Encarta? Become a subscriber today and gain access to: Daily Math Help Literature Guides Researcher Tools Paper-Writing Guides 60,000 + articles Interactive Atlas Magazine Center Find more about Sitter, Willem de from Related Items Other Features from Encarta Cosmology Big Bang Theory Relativity Search Encarta for ... Sitter, Willem de © 2005 Microsoft MSN Privacy Legal Advertise Feedback ... Help

30. Sitter, Willem De. The Columbia Encyclopedia, Sixth Edition. 2001-05 sitter, willem de. The Columbia Encyclopedia, Sixth Edition. 200105. http://www.bartleby.com/65/si/Sitter-W.html

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31. De Sitter, Willem. The Columbia Encyclopedia, Sixth Edition. 2001-05 de sitter, willem. The Columbia Encyclopedia, Sixth Edition. 200105. 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

32. AllRefer.com - Willem De Sitter (Astronomy, Biography) - Encyclopedia AllRefer.com reference and encyclopedia resource provides complete informationon willem de sitter, Astronomy, Biographies. Includes related research links. http://reference.allrefer.com/encyclopedia/X/X-DeSitter.html

AllRefer Channels :: Health Yellow Pages Reference Weather August 31, 2005 Medicine People Places History ... Maps Web AllRefer.com You are here : AllRefer.com Reference Encyclopedia Astronomy, Biographies ... Willem De Sitter By Alphabet : Encyclopedia A-Z D Willem De Sitter, Astronomy, Biographies Related Category: Astronomy, Biographies Willem De Sitter see Sitter, Willem de Topics that might be of interest to you: Willem de Sitter Related Categories: People Science and Technology Science and Technology Astronomy and Space Exploration ... Biographies More articles from AllRefer Reference on Willem De Sitter SITE MAPS Encyclopedia US Gazetteer: US States A-C US States D-H US States I-L US States M ... Countries A-Z Content on this web site is provided for informational purposes only. We accept no responsibility for any loss, injury or inconvenience sustained by any person resulting from information published on this site. We encourage you to verify any critical information with the relevant authorities. About Us Contact Us Privacy Links Directory ... Par Web Solutions Site best viewed in 800 x 600 resolution.

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34. Sitter, Willem De sitter, willem de (18721934) de sitter was born in Sneek, Friesland, andstudied at the University of Groningen and the Royal Observatory, Cape Town, 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.

35. Encyclopedia Of Astronomy And Astrophysics » De Sitter, Willem (1872–1934) de sitter, willem (1872–1934). DOI 10.1888/0333750888/4008; Published November 2000.Icon Full text (PDF, 22K). Article summary http://eaa.iop.org/index.cfm?action=summary&doc=eaa/4008@eaa-xml

36. Encyclopedia Of Astronomy And Astrophysics » Browse By Subject Article de sitter, willem (1872–1934); Published November 2000; SummaryCosmologist, born in Sneek, Netherlands, and started a rather traditional career http://eaa.iop.org/index.cfm?action=browse.home&type=cl&dir=History and Archaeoa

37. Sitter Portraits Portraits of willem de sitter. The URL of this page is, © Copyright information.http//wwwhistory.mcs.st-andrews.ac.uk/history/PictDisplay/sitter.html. http://www-groups.dcs.st-and.ac.uk/~history/PictDisplay/Sitter.html

Willem De Sitter At the 1934 EMS colloquium in St Andrews JOC/EFR August 2005 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/PictDisplay/Sitter.html

38. National Academy Of Sciences - Deceased Member 3 Testing 1 .. 2 .. 3 Advanced Search. de sitter, willem. Date of Birth,May 6, 1872. Elected to NAS, 1929. Date of death, November 21, 1934. http://www4.nationalacademies.org/nas/nasdece.nsf/(urllinks)/NAS-58MVCN?opendocu

39. 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 ... Quotes of Stewart B. Johnson 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. S.O.S. document.write('') Universal Studio E-Mail help Promotional Products Dedicated server nj/ny ... Affordable Dedicated Server

40. AbsoluteFacts.nl - Sitter, Willem De (1872-1934) de Nederlandse wiskundige, astronoom, kosmoloog en natuurkundige willem de Sitterwerd in mei 1872 in Sneek geboren. http://www.absofacts.com/wetenschap/data/sitterwillemde1872.shtml

Culturele Encyclopedie: wetenschap, ontdekkingen, onderzoekers, uitvindingen, uitvinders, wetenschappers GratisAanbiedingen.nl HierBestellen.nl Tentoonstellingen Gemakkelijk Zoeken op het Internet ... KennisQuiz.nl Sitter, Willem de (1872-1934) De Nederlandse wiskundige, astronoom, kosmoloog en natuurkundige Willem de Sitter werd in mei 1872 in Sneek geboren. Hij was de zoon van rechter Lamoraal Ulbo de Sitter en Catharina Bestling. De Sitter raakte tijdens zijn studie wiskunde en natuurkunde aan de Universiteit in Groningen geïnteresseerd in kosmologie. Willem de Sitter promoveerde in 1901 bij Jacobus Cornelius Kapteyn. De titel van zijn dissertatie was "Discussion of heliometer observations of Jupiter's satellites". In 1908 werd hij hoogleraar Astronomie aan de universiteit in Leiden. In 1918 werd hij directeur van de Leidse Sterrenwacht. In 1918 was Willem de Sitter betrokken bij een poging om de Nederlandse astronoom Anton Pannekoek aan te stellen voor de Leidse Sterrewacht, maar deze voordracht stuitte op verzet van minister Ruijs de Beerenbrouck, vanwege de linkse sympathieën van Anton Pannekoek. Vanuit zijn wiskundige achtergrond maakt Willem de Sitter met statistische technieken verschillende modellen om het ontstaan van de kosmos te beschrijven. Toen hij op de hoogte werd gebracht van de relativiteitstheorie, zag Willem de Sitter direct het belang hiervan in en werd hij een belangrijk uitdrager van de theorieën van Albert Einstein.

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