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Ejnar_Hertzsprung abstract "Ejnar Hertzsprung (Danish pronunciation: [ɑjnɐ ˈhæɐ̯d̥sb̥ʁɔŋ], 8 October 1873 – 21 October 1967) was a Danish chemist and astronomer, born in Copenhagen, Denmark. In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram.In 1913 he determined the distances to several Cepheid variable stars by statistical parallax, and was thus able to calibrate the relationship discovered by Henrietta Leavitt between Cepheid period and luminosity. In this determination he made a mistake, possibly a slip of the pen, putting the stars 10 times too close. He used this relationship to estimate the distance to the Small Magellanic Cloud. From 1919 to 1946 Hertzsprung worked at Leiden Observatory in the Netherlands, from 1937 as director. Among his graduate students at Leiden was Gerard Kuiper. Perhaps his greatest contribution to astronomy was the development of a classification system for stars to divide them by spectral type, stage in their development, and luminosity. The so-called \"Hertzsprung–Russell Diagram\" has been used ever since as a classification system to explain stellar types and stellar evolution. He also discovered two asteroids, one of which is 1627 Ivar, an Amor asteroid.His wife Henrietta (1881–1956) was a daughter of the Dutch astronomer Jacobus Kapteyn. Hertzsprung died in Roskilde in 1967. The asteroid 1693 Hertzsprung was named in his honour.".
Ejnar_Hertzsprung award Bruce_Medal.
Ejnar_Hertzsprung birthDate "1873-10-08".
Ejnar_Hertzsprung birthPlace Copenhagen.
Ejnar_Hertzsprung birthPlace Denmark.
Ejnar_Hertzsprung deathDate "1967-10-21".
Ejnar_Hertzsprung deathPlace Denmark.
Ejnar_Hertzsprung deathPlace Roskilde.
Ejnar_Hertzsprung field Astronomy.
Ejnar_Hertzsprung field Chemistry.
Ejnar_Hertzsprung knownFor Hertzsprung–Russell_diagram.
Ejnar_Hertzsprung nationality Denmark.
Ejnar_Hertzsprung thumbnail Karl_Schwarzschild_and_Ejnar_Hertzsprung_(1909).jpg?width=300.
Ejnar_Hertzsprung wikiPageExternalLink 0000404.000.html.
Ejnar_Hertzsprung wikiPageExternalLink 0000065.000.html.
Ejnar_Hertzsprung wikiPageExternalLink index.html.
Ejnar_Hertzsprung wikiPageID "86810".
Ejnar_Hertzsprung wikiPageLength "4575".
Ejnar_Hertzsprung wikiPageOutDegree "47".
Ejnar_Hertzsprung wikiPageRevisionID "705667326".
Ejnar_Hertzsprung wikiPageWikiLink 1627_Ivar.
Ejnar_Hertzsprung wikiPageWikiLink 1693_Hertzsprung.
Ejnar_Hertzsprung wikiPageWikiLink Amor_asteroid.
Ejnar_Hertzsprung wikiPageWikiLink Asteroid.
Ejnar_Hertzsprung wikiPageWikiLink Astronomy.
Ejnar_Hertzsprung wikiPageWikiLink Bruce_Medal.
Ejnar_Hertzsprung wikiPageWikiLink Cambridge,_Massachusetts.
Ejnar_Hertzsprung wikiPageWikiLink Category:1873_births.
Ejnar_Hertzsprung wikiPageWikiLink Category:1967_deaths.
Ejnar_Hertzsprung wikiPageWikiLink Category:20th-century_astronomers.
Ejnar_Hertzsprung wikiPageWikiLink Category:Danish_astronomers.
Ejnar_Hertzsprung wikiPageWikiLink Category:Danish_chemists.
Ejnar_Hertzsprung wikiPageWikiLink Category:Discoverers_of_asteroids.
Ejnar_Hertzsprung wikiPageWikiLink Category:People_from_Copenhagen.
Ejnar_Hertzsprung wikiPageWikiLink Category:Recipients_of_the_Gold_Medal_of_the_Royal_Astronomical_Society.
Ejnar_Hertzsprung wikiPageWikiLink Cepheid_variable.
Ejnar_Hertzsprung wikiPageWikiLink Chemistry.
Ejnar_Hertzsprung wikiPageWikiLink Copenhagen.
Ejnar_Hertzsprung wikiPageWikiLink Denmark.
Ejnar_Hertzsprung wikiPageWikiLink Gerard_Kuiper.
Ejnar_Hertzsprung wikiPageWikiLink Gold_Medal_of_the_Royal_Astronomical_Society.
Ejnar_Hertzsprung wikiPageWikiLink Henrietta_Swan_Leavitt.
Ejnar_Hertzsprung wikiPageWikiLink Henry_Norris_Russell.
Ejnar_Hertzsprung wikiPageWikiLink Hertzsprung_(crater).
Ejnar_Hertzsprung wikiPageWikiLink Hertzsprung–Russell_diagram.
Ejnar_Hertzsprung wikiPageWikiLink Jacobus_Kapteyn.
Ejnar_Hertzsprung wikiPageWikiLink Karl_Schwarzschild.
Ejnar_Hertzsprung wikiPageWikiLink Leiden_Observatory.
Ejnar_Hertzsprung wikiPageWikiLink 1701–1800.
Ejnar_Hertzsprung wikiPageWikiLink Luminosity.
Ejnar_Hertzsprung wikiPageWikiLink Parallax.
Ejnar_Hertzsprung wikiPageWikiLink Roskilde.
Ejnar_Hertzsprung wikiPageWikiLink Small_Magellanic_Cloud.
Ejnar_Hertzsprung wikiPageWikiLink Stellar_evolution.
Ejnar_Hertzsprung wikiPageWikiLinkText "E. Hertzsprung".
Ejnar_Hertzsprung wikiPageWikiLinkText "Ejnar Hertzsprung".
Ejnar_Hertzsprung wikiPageWikiLinkText "Hertzsprung".
Ejnar_Hertzsprung wikiPageWikiLinkText "Hertzsprung, Ejnar".
Ejnar_Hertzsprung almaMater "Copenhagen Polytechnic".
Ejnar_Hertzsprung birthDate "1873-10-08".
Ejnar_Hertzsprung birthPlace Copenhagen.
Ejnar_Hertzsprung birthPlace Denmark.
Ejnar_Hertzsprung caption "Ejnar Hertzsprung and Karl Schwarzschild in professorial gowns in front of the Göttingen Observatory building .".
Ejnar_Hertzsprung deathDate "1967-10-21".
Ejnar_Hertzsprung deathPlace Denmark.
Ejnar_Hertzsprung deathPlace Roskilde.
Ejnar_Hertzsprung field Astronomy.
Ejnar_Hertzsprung field Chemistry.
Ejnar_Hertzsprung knownFor Hertzsprung–Russell_diagram.
Ejnar_Hertzsprung name "Ejnar Hertzsprung".
Ejnar_Hertzsprung nationality Denmark.
Ejnar_Hertzsprung prizes "Bruce Medal 1937".
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Ejnar_Hertzsprung workInstitutions Leiden_Observatory.
Ejnar_Hertzsprung subject Category:1873_births.
Ejnar_Hertzsprung subject Category:1967_deaths.
Ejnar_Hertzsprung subject Category:20th-century_astronomers.
Ejnar_Hertzsprung subject Category:Danish_astronomers.
Ejnar_Hertzsprung subject Category:Danish_chemists.
Ejnar_Hertzsprung subject Category:Discoverers_of_asteroids.
Ejnar_Hertzsprung subject Category:People_from_Copenhagen.
Ejnar_Hertzsprung subject Category:Recipients_of_the_Gold_Medal_of_the_Royal_Astronomical_Society.
Ejnar_Hertzsprung hypernym Chemist.
Ejnar_Hertzsprung type Agent.
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Ejnar_Hertzsprung type Scientist.
Ejnar_Hertzsprung type Person.
Ejnar_Hertzsprung type Scientist.
Ejnar_Hertzsprung type Winner.
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Ejnar_Hertzsprung type NaturalPerson.