Henry Draper system

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• Henry Draper Catalogue — ▪ astronomy       listing of the positions, magnitudes, and spectral types of stars in all parts of the sky; with it began the present alphabetical system (see Harvard classification system (stellar classification)) of classifying stars by… …   Universalium

• Henry Norris Russell — Born October 25, 1877(1877 10 25) Oyster Bay, New York, USA Died February 18, 1957( …   Wikipedia

• Henry Augustus Rowland — Infobox Scientist name = PAGENAME box width = image size =250px caption = PAGENAME birth date = November 27, 1848 birth place = Honesdale, Pennsylvania death date = April 16, 1901 death place = residence = |citizenship = nationality = U.S.… …   Wikipedia

• John William Draper House — Infobox nrhp | name =John W. Draper House nrhp type = nhl locmapin = New York caption = Front view of house in 2007 location= 407 Broadway, Hastings on Hudson, NY lat degrees = 40 | lat minutes = 59 | lat seconds = 28.6 | lat direction = N long… …   Wikipedia

• Harvard-System — Hertzsprung Russell Diagramm Spektralklasse Braune Zwerge …   Deutsch Wikipedia

• William Henry Griffith Thomas — (1861 1924) was an Anglican clergyman and scholar from the English Welsh border country. He has been quoted by theologian Alister McGrath in the science versus religion debate. Life and workGriffith Thomas was born in Oswestry, Shropshire,… …   Wikipedia

• Morgan , William Wilson — (1906–1994) American astronomer Morgan, who was born in Bethesda, Tennessee, studied at the Washington and Lee University and then at the University of Chicago where he obtained his BSc in 1927 and his PhD in 1931. The following year, he took up… …   Scientists

• Stellar classification — In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are… …   Wikipedia

• Annie Jump Cannon — Infobox Scientist name = PAGENAME box width = image size =150px caption = PAGENAME birth date = December 11, 1863 birth place = death date = April 13, 1941 death place = residence = |citizenship = nationality = American ethnicity = field =… …   Wikipedia

• Star catalogue — An illustration of the Perseus constellation (after Perseus from Greek mythology) from the star catalogue published by the German astronomer Johannes Hevelius in 1690 A star catalogue, or star catalog, is an astronomical catalogue that lists… …   Wikipedia

• History of private equity and venture capital — The history of private equity and venture capital and the development of these asset classes has occurred through a series of boom and bust cycles since the middle of the 20th century. Within the broader private equity industry, two distinct sub… …   Wikipedia