61. De Sitter - Inflation The de sitter Model, which was first discoved by willem de sitter in 1917, isdefined by the following conditions. The first Friedmann Equation is http://scholar.uwinnipeg.ca/courses/38/4500.6-001/Cosmology/deSitter_Inflation.h

MPBodyInit('deSitter_Inflation_files') de Sitter Model This is a solution of the cosmological equations where only the cosmological constant provides energy density for the universe. Although at later times it is unrealistic, at early stages of the Big Bang Model it can represent the dominant contribution to the energy density of the universe when he universe gets temporarily stuck in high energy phases. The de Sitter Model, which was first discoved by Willem de Sitter in 1917, is defined by the following conditions: MPSetEqnAttrs('eq0001','',3,[[162,27,-1,-1,-1],[216,37,-1,-1,-1],[271,46,-2,-1,-1],[243,42,-1,-1,-1],[324,55,-2,-1,-1],[405,68,-2,-2,-2],[677,114,-4,-3,-3]]) MPSetEqnAttrs('eq0001','',3,[[162,27,-1,-1,-1],[216,37,-1,-1,-1],[271,46,-2,-1,-1],[243,42,-1,-1,-1],[324,55,-2,-1,-1],[405,68,-2,-2,-2],[677,114,-4,-3,-3]]) MPNNCalcTopLeft(document.mpeq0001ph,'1') MPDeleteCode('eq0001') The first Friedmann Equation is: MPSetEqnAttrs('eq0002','',3,[[239,68,5,-1,-1],[316,90,7,-1,-1],[398,113,9,-1,-1],[357,103,8,-1,-1],[477,138,11,-1,-1],[595,174,14,-2,-2],[995,289,23,-3,-3]]) MPSetEqnAttrs('eq0002','',3,[[239,68,5,-1,-1],[316,90,7,-1,-1],[398,113,9,-1,-1],[357,103,8,-1,-1],[477,138,11,-1,-1],[595,174,14,-2,-2],[995,289,23,-3,-3]])

62. MSN Encarta - De Sitter, Willem Translate this page de sitter, willem (1872-1934), mathématicien, physicien et astronome néerlandais, Autres fonctionnalités Encarta. Rechercher de sitter, willem http://fr.encarta.msn.com/encyclopedia_741533825/De_Sitter_Willem.html

Accueil MSN Mon MSN Hotmail Rechercher ... Tout savoir sur la gamme Encarta Rechercher sur Encarta 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

63. Willem Jacob Luyten, March 7, 1899—November 21, 1994 | By Arthur Upgren | Biogr willem LUYTEN WAS THE central figure in the determination of the stellar luminosityfunction, Ejnar Hertzsprung, willem de sitter, and Jan H. Oort. http://bob.nap.edu/html/biomems/wluyten.html

BIOGRAPHICAL MEMOIRS National Academy of Sciences Photo by Kallman Studio Willem Jacob Luyten By Arthur Upgren WILLEM LUYTEN WAS THE central figure in the determination of the stellar luminosity function, the frequency function of stars by their luminosity. In this, his major research contribution, he followed in the tradition of Dutch astronomers, mostly of the Leiden Observatory, which began before 1900 with J. C. Kapteyn and included P. J. van Rhijn, Ejnar Hertzsprung, Willem De Sitter, and Jan H. Oort. Luyten was one of a number of distinguished students of these scientists who emigrated to the United States and had a memorable career. His contemporaries included Bart J. Bok, Dirk Brouwer, Gerard P. Kuiper, Jan Schilt, Kaj Aa. Strand, and Peter van de Kamp. Luyten spoke of his ancestry as part French, originating in Provence in the fourteenth century. The family name may have been Lutin and derived from lute players and minstrels attending the popes who resided in Avignon. In 1377 the popes moved back to Rome and the progenitor lute player resettled at the Court of Burgundy. The dukes there united the cities of Holland, and during ducal rule over the next century, the family may have found its way to the Netherlands. His mother's family name of Francken reveals her origin there. Luyten, himself, was born of parents of North Holland, who had settled in Indonesia, then a colony of the Netherlands. His birth on March 7, 1899, was in the city of Semarang in north-central Java, where his father taught French in the local high school. Luyten lived there until 1912, when the family moved back to the Netherlands. At that time he spoke Dutch and French; he also became fluent in German and English before his high school graduation. Later in college he mastered Latin and Greek, and still later, he picked up some Spanish and Italian, and finally, in 1927, Russian. He was rightfully proud of his ability to learn to read and speak so many languages.

64. Sitter Definition From Aiedu.com sitter definitation from aiedu.com A Free Internet Dictionary. Synonymssitter, willem de sitter. hypernym astronomer uranologist stargazer http://dict.aiedu.com/word/sitter

An Internet Dictionary! Welcome! My Dictionary Help Links Log In ... Sign Up Search In Wordnet noun sitter > Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934) (noun.person) Synonyms: Sitter Willem de Sitter hypernym: astronomer uranologist stargazer sitter > an organism (person or animal) that sits (noun.person) Synonyms: sitter antonym: stander hypernym: organism being domain category: animal animate being beast brute ... fauna sitter > a person engaged to care for children when the parents are not home (noun.person) Synonyms: babysitter baby-sitter sitter hypernym: keeper sitter > a person who poses for a painter or sculptor (noun.person) Synonyms: artist's model sitter hypernym: model poser sitter > a domestic hen ready to brood (noun.animal) Synonyms: brood hen broody broody hen setting hen ... sitter hypernym: hen biddy Search In cDict sit.ter 2 = babysitter Other words starts with s sales sahib saffron safeguarded ... salty 2005 AI Edu - Power the Internet Education. a b c d ... z Link Partner: Deals On Products Men's Magazines Business Directory Panasonic Plasma TV ... Cheap Flights

65. Pet Sitter Atlanta de Sktter universe 1 ter solution ) is a term named after willem de Sitger Event horizon 37 iverse expands quickly enough, for example a de sitter http://www.musicians-resource.com/site/8485-pet-sitter-atlanta.html

AMERICAN MUSIC SCENE Home > Pet Sitter Atlanta Categories Drawer Knobs Drake San Francisco Downloadable Ring Tones Dow Silicone ... Discount Drug Pet Sitter Atlanta Clarifications 1) " Pet" As it applies to Pet Sitter Atlanta This page is about domestic animals. For several meanings of the acronym Put , see Pt . A pet or companion animal is an animal that is kept by humans for companionship and enjoyment, rather than for economic reasons. The most popular arenoted for their loyal or playful characteristics or their beautiful appearance or song. While in theory one could keep a blue whale as a Pt , in practice a smallnumber of species of mammals, especially dogs and cats, and other animals such as birds have dominatedthe Pt scene for a very long time. Fish have joined them more recently. Many of these are domesticated while others, often considered novelty Pit s,are not. With the exception of iguanas and non-venomous snakes, few reptiles andamphibians make good Pit s. The glofish, a genetically modified zebrafish with a bright redfluorescent color is the first genetically modified (GM) animal to be engineered as a Prt . A can be acquired from a Pe store, an animal shelter, a breeder, and sometimes from people who have too many due to births. See also Dog adoption.

66. De Sitter Universe - Wikipedia, The Free Encyclopedia A de sitter universe is a solution to Einstein s field equations of GeneralRelativity which is named after willem de sitter. It is common to describe a http://en.wikipedia.org/wiki/De_Sitter_universe

Wikimedia needs your help in its 21-day fund drive. See our fundraising page Over US$150,000 has been donated since the drive began on 19 August. Thank you for your generosity! De Sitter universe From Wikipedia, the free encyclopedia. It has been suggested that this article or section be merged with de Sitter space Discuss A de Sitter universe is a solution to Einstein 's field equations of General Relativity which is named after Willem de Sitter . It is common to describe a patch of this solution as an expanding universe of the FLRW form where the scale factor is given by: a t e H t where the constant H is the Hubble expansion rate and t is time. As in all FLRW spaces, a t , the scale factor , describes the expansion of physical spatial distances. A de Sitter universe is one with no ordinary matter content but with a positive cosmological constant which sets the expansion rate, H. A larger cosmological constant leads to a larger expansion rate: where the constants of proportionality depend on conventions. The cosmological constant is and M p l is the Planck mass Our universe may be approaching a de Sitter universe in the infinite future. If the current acceleration of our universe is due to a cosmological constant then as the universe continues to expand all of the matter and radiation will be diluted. Eventually there will be almost nothing left but the cosmological constant, and our universe will have become a de Sitter universe.

67. De Sitter (crater) - Wikipedia, The Free Encyclopedia Eponym willem de sitter References, See listing Where de sitter overlaysthe other two craters, its outer rim appears slumped. http://en.wikipedia.org/wiki/De_Sitter_(crater)

Wikimedia needs your help in its 21-day fund drive. See our fundraising page Over US$150,000 has been donated since the drive began on 19 August. Thank you for your generosity! De Sitter (crater) From Wikipedia, the free encyclopedia. General characteristics Latitude 80.1° N Longitude 39.6° E Diameter 65 km Depth Unknown Colongitude 328° at sunrise Eponym Willem de Sitter References See listing De Sitter is a lunar crater that is located near the northern limb of the Moon , to the north of the Baillaud Euctemon crater pair. Due to its location, this crater appears very foreshortened when viewed from the Earth , limiting the detail that can be viewed. The crater also receives sunlight at a low angle, when it is on the sunlit side. This crater forms part of an unusual three-crater cluster, with De Sitter overlaying the northeast rim of 'De Sitter L' and the southern rim of 'De Sitter M'. All three craters are of comparable dimension, with the largest being 'De Sitter M'. Where De Sitter overlays the other two craters, its outer rim appears slumped. The rim is more sharply formed along the east-southeast side. Laying next to this part of the rim is 'De Sitter G', a small formation of two merged craters. The interior floor of De Sitter is somewhat irregular and hummocky, with a slender central ridge near the mid-point. There are several small and tiny craterlets across the interior floor.

68. Table Of Contents For Einstein, A.; Schulmann, R., Kox, A.J., Janssen, M., Et Al From willem de sitter, 1 April 1917 322. To Hendrik A. Lorentz, 3 April 1917 From willem de sitter, 10 April 1918 502. To Hugo A. Krüss, before 11 April http://www.pupress.princeton.edu/TOCs/c6206.html

SEARCH: Keywords Author Title More Options Power Search Search Hints E-MAIL NOTICES NEW IN PRINT E-BOOKS ... HOME PAGE The Collected Papers of Albert Einstein, Volume 8: The Berlin Years: Correspondence, 1914-1918. Albert Einstein Book Description TABLE OF CONTENTS: List of Texts PART A Vol. 1, 116. From Mileva Maric, after 7 July 1901* Vol. 5, 136a. From Dmitry Mirimanoff, 5 February 1909* Vol. 5, 136b. To Dmitry Mirimanoff, 9 February 1909* Vol. 5, 312a. To Marie Curie, 23 November 1911* Vol. 5, 375a. From Walther Nernst, 23 March 1912* Vol. 5, 430. To Unknown Addressee, 2 March 1913* Vol. 5, 500a. To Jakob Ehrat, 7 January 1914* *The above documents were discovered after the publication of Volume Five. 1. To Mileva Einstein-Maric, 2 April 1914 2. To Paul Ehrenfest, before 10 April 1914 3. To Mileva Einstein-Maric, Hans Albert and Eduard Einstein, 10 April 1914 4. From Paul Ehrenfest, 10 April 1914 or later 5. To Joseph Petzoldt, 14 April 1914 6. To Adolf Hurwitz and Family, 4 May 1914 9. From Paul Ehrenfest, 20 May 1914 10. From Paul Ehrenfest, 21 May 1914

69. Table Of Contents For Einstein, A.; Hentschel, A., Trans.: The Collected Papers From willem de sitter, 1 April 1917 312 322. To Hendrik A. Lorentz, 3 April 1917 313 From willem de sitter, 10 April 1918 523 502. To Hugo A. Krüss, http://www.pupress.princeton.edu/TOCs/c6174.html

SEARCH: Keywords Author Title More Options Power Search Search Hints E-MAIL NOTICES NEW IN PRINT E-BOOKS ... HOME PAGE The Collected Papers of Albert Einstein, Volume 8: The Berlin Years: Correspondence, 1914-1918. (English supplement translation.) Albert Einstein Translated by Ann M. Hentschel Klaus Hentschel, Consultant Book Description TABLE OF CONTENTS: List of Texts v Publisher's Foreword xiii Acknowledgments xxv Texts 3 Vol. 1, 116. From Mileva Maric, after 7 July 1901 3 Vol. 5, 136a. From Dmitry Mirimanoff, 5 February 1909 4 Vol. 5, 136b. To Dmitry Mirimanoff, 9 February 1909 5 Vol. 5, 312a. To Marie Curie, 23 November 1911 5 Vol. 5, 375a. From Walther Nernst, 23 March 1912 6 Vol. 5, 430. To Unknown Addressee, 2 March 1913 7 Vol. 5, 500a. To Jakob Ehrat, 7 January 1914 8 1. To Mileva Einstein-Maric, 2 April 1914 9 2. To Paul Ehrenfest, before 10 April 1914 9 3. To Mileva Einstein-Maric, Hans Albert and Eduard Einstein, 10 April 1914 11 4. From Paul Ehrenfest, 10 April 1914 or later 11 5. To Joseph Petzoldt, 14 April 1914 12 6. To Adolf Hurwitz and Family, 4 May 1914 13

70. History Of Science And Scholarship In The Netherlands: Willem De Sitter willem de sitter 1872 1934 By PC van der Kruit The Einstein - de sitter Universewillem de sitter was born in Sneek on May 6, 1872. http://www.historyofscience.nl/author.cfm?RecordId=4

71. The Nature Of Time But, as willem de sitter has pointed out very clearly no hypothesis thus de sitter, willem, Kosmos, Harvard University Press, Cambridge, 1932, page 106. http://www.reciprocalsystem.com/ce/timenat.htm

72. NPG D15602; Jan Willem De Winter NPG D15602; Jan willem de Winter. sitter Jan willem de Winter (17501812),Dutch admiral. sitter in 1 portrait. Artists John Evans (1753-1820). http://www.npg.org.uk/live/search/portrait.asp?LinkID=mp66096&rNo=0&role=art

73. Science Timeline de sitter, willem, 1917, 1932, 1948. de Vries, Hugo, 1900, 1901, 1917. debye,Peter Joseph Wilhelm, 1932. deC, 1956. dedekind, Julius Wilhelm Richard, 1872 http://www.sciencetimeline.net/siteindex_d.htm

use checkboxes to select items you wish to download Select Index Letter: a b c d ... w-x-y-z da Vinci, Leonardo, 1482 Daimler, Gottlieb, 1883 Dalibard, Jean, 1982 Dalton, John, 1801, 1801, 1803, 1808 Dam, Henrik, 1934 Danielli, James Frederick, 1935 Dart, Raymond Arthur, 1925 Darwin, Charles Robert, 435 bce, 1829, 1844, 1844, 1858, 1859, 1867, 1867, 1871, 1871, 1872, 1901 Darwin, Erasmus, 1794, 1809 Dausset, Jean, 1954 Davis, Mark, 1980 Davis, Ronald, 1973, 1980 Davisson, Clinton Joseph, 1927 Davson, Hugh, 1935 Davy, Humphrey, 1799, 1807, 1813, 1821 Dawkins, Richard, 1973, 1975 Dawson, John M., 1979 de Beer, Gavin, 1930, 1934, 1940 de Broglie, Louis Victor, 1924, 1926, 1927, 1927, 1952 de Herbert, Joseph, 1778 de la Mettrie, Julian, 1747

74. A Ritzian Interpretation Of Variable Stars In 1913 willem de sitter urged abandonment of the Ritz theory because binarystars (the interstellar medium scenario) failed to show the predicted c + v http://www.ebicom.net/~rsf1/binaries.htm

Home Up one level Previous Next This article has the following sections. A Ritzian Interpretation of Variable Stars - You are here! Non-pulsating Cepheid Variables Ritzian Gamma-Ray Bursts Ultra High Energy Cosmic Rays Modeling Geminga ... GRB 790731 and omega Geminorum A Ritzian Interpretation of Variable Stars An enlargement on 1987-1989 researches by V.I. Sekerin and M.S. Serbulenko Installed 05 Jan 1999 - Latest Update 12 December 2004 (Newly added or modified material is in bold.) Keywords: Close Binary Stars, Gamma-Ray Bursts, Spectroscopic Interpretation, Speed of Light An abbreviated version of this document, with recent historical updates and a special emphasis on Gamma-Ray Bursts, was presented as Gamma-Ray Bursts: Sans Second Postulate at the 35th COSPAR meeting in Paris on 19-21 July 2004. This article is written under the presumption that the constancy of the "measured" speed of light by all observers (in vacuo) is an unresolved issue. The author favors Ritz's use of c+v relativity but with the reservation that extinction (Tolman or Ewald-Oseen), i.e., the speed of light eventually reaches a terminal speed with respect to any given medium, has to be taken into account.

75. Imago Mundi - Willem De Sitter. de Groningen (Pays-Bas), il a travaillé pour l essentiel à l unversité http://www.cosmovisions.com/Sitter.htm

Les gens de Sitter de Jupiter Einstein A B C ... Z

76. Sciforums.com - Supernova From Experimentation At Fermilab de sitter space by willem sitter, there has been no refutation of this The very large energies derived by willem de sitter for the equations describing http://www.sciforums.com/showthread.php?t=2607&goto=lastpost

77. WILLEM DE SITTER Il fait ses premières années d études dans cette ville. http://clubastronomie.free.fr/histoire/willem_de_sitter.htm

78. Willem De Sitter - BlueRider.com willem de sitter listen domain availability. Dictionary and Thesaurus entriesfor. willem de sitter. Your search results http://willem_de_sitter.bluerider.com/wordsearch/willem_de_sitter

Enter a word or phrase Random Word settle Other Services Word Index Contact Us ... Links willem de sitter listen domain availability Dictionary and Thesaurus entries for: willem de sitter Your search results... Web bluerider.com willem de sitter [n] Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934) Synonyms : sitter See Also: astronomer Your Search History clear Enter a word or phrase Terms of Service Linux Man Pages Geographic Information ccTLD Information

79. Biografia De Sitter, Willem De Translate this page sitter, willem de. (1872-1934) Astrónomo holandés, destacado por sus investigacionesen el campo de la mecánica celeste, n. en Sneek (Frisia) y m. en Leiden http://www.biografiasyvidas.com/biografia/s/sitter.htm

Inicio Buscador Las figuras clave de la historia Reportajes Los protagonistas de la actualidad Sitter, Willem de Inicio Buscador Recomendar sitio

80. Kosmologika - Vetenskapsmännen - Willem De Sitter Födelseland Holland Födelseår 1872 Död år 1934 willem de sitter Courtesy YerkesObservatory). willem de sitter föddes den 6 maj år 1872 i Holland. http://www.kosmologika.net/Scientists/Sitter.html

Födelseland: Holland Födelseår: 1872 Död år: 1934 Willem de Sitter föddes den 6 maj år 1872 i Holland. Han studerade vid universitetet i Groningen och tillbringade den största delen av sin karriär vid universitetet i Leiden där han hade hand om astronomiprogrammet. Observerade dessutom under ett kort tag med David Gill vid Godahoppsudden. Han arbetade mycket med jupitermånarnas rörelser och bestämde deras massor och omloppsbanor genom årtionden av observationer. Han återinförde astronomins grundläggande konstanter och bestämde variationen i Jordens rörelse. Utförde statistiska studier av fördelningen och rörelser hos stjärnor. Han är dock numera mest känd för hans bidrag till kosmologin. Hans lösning till Einsteins fältekvationer år 1917 visade att ett universum fritt från massa måste expandera. Senare fann de Sitter och Albert Einstein (1879-1955) en lösning med ett expanderande universum som inte är krökt. Modifierade Einsteins statiska teori inom kosmologin till en skenbart statisk teori och förutsade därmed att avståndet är proportionellt mot rödförskjutningen. Fick 1931 års Brucemedalj . Dog den 19 november år 1934.

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