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- André-Louis_Danjon abstract "André-Louis Danjon (6 April 1890 – 21 April 1967) was a French astronomer born in Caen to Louis Dominique Danjon and Marie Justine Binet.Danjon devised a method to measure "Earthshine" on the Moon using a telescope in which a prism split the Moon's image into two identical side-by-side images. By adjusting a diaphragm to dim one of the images until the sunlit portion had the same apparent brightness as the earthlit portion on the unadjusted image, he could quantify the diaphragm adjustment, and thus had a real measurement for the brightness of Earthshine. He recorded the measurements using his method (now known as the Danjon Scale, on which zero equates to a barely visible Moon) from 1925 until the 1950s.Among his notable contributions to astronomy was the design of the impersonal (prismatic) astrolabe now known as the Danjon astrolabe, which led to an improvement in the accuracy of fundamental optical astrometry. An account of this instrument, and of the results of some early years of its operation, are given in Danjon's 1958 George Darwin Lecture to the Royal Astronomical Society (in Monthly Notices of the RAS (1958), vol.118, pages 411-431).He was Director of the Observatory of Strasbourg from 1930 to 1945 and of the Paris Observatory from 1945 to 1963 (see biographical notice at the website of the Observatoire de Paris http://www.obspm.fr/histoire/paris/danjon.fr.shtml).He was awarded the Prix Jules Janssen of the French Astronomical Society in 1950, and the Gold Medal of the Royal Astronomical Society in 1958.Danjon died in 1967 in Suresnes, Hauts-de-Seine.".
- André-Louis_Danjon birthDate "1890-04-06".
- André-Louis_Danjon birthPlace Caen.
- André-Louis_Danjon deathDate "1967-04-21".
- André-Louis_Danjon deathPlace Paris.
- André-Louis_Danjon wikiPageID "64814".
- André-Louis_Danjon wikiPageRevisionID "549906872".
- André-Louis_Danjon birthDate "1890-04-06".
- André-Louis_Danjon birthPlace Caen.
- André-Louis_Danjon dateOfBirth "1890-04-06".
- André-Louis_Danjon dateOfDeath "1967-04-21".
- André-Louis_Danjon deathDate "1967-04-21".
- André-Louis_Danjon deathPlace Suresnes.
- André-Louis_Danjon field Astronomy.
- André-Louis_Danjon knownFor Danjon_scale.
- André-Louis_Danjon name "André-Louis Danjon".
- André-Louis_Danjon name "Danjon, Andre".
- André-Louis_Danjon nationality France.
- André-Louis_Danjon placeOfBirth Caen.
- André-Louis_Danjon placeOfDeath Paris.
- André-Louis_Danjon prizes "Gold Medal of the Royal Astronomical Society in 1958".
- André-Louis_Danjon shortDescription "French astronomer".
- André-Louis_Danjon description "French astronomer".
- André-Louis_Danjon subject Category:1890_births.
- André-Louis_Danjon subject Category:1967_deaths.
- André-Louis_Danjon subject Category:20th-century_astronomers.
- André-Louis_Danjon subject Category:French_astronomers.
- André-Louis_Danjon subject Category:People_from_Caen.
- André-Louis_Danjon subject Category:Recipients_of_the_Gold_Medal_of_the_Royal_Astronomical_Society.
- André-Louis_Danjon subject Category:University_of_Strasbourg_faculty.
- André-Louis_Danjon type Agent.
- André-Louis_Danjon type Person.
- André-Louis_Danjon type Scientist.
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- André-Louis_Danjon comment "André-Louis Danjon (6 April 1890 – 21 April 1967) was a French astronomer born in Caen to Louis Dominique Danjon and Marie Justine Binet.Danjon devised a method to measure "Earthshine" on the Moon using a telescope in which a prism split the Moon's image into two identical side-by-side images.".
- André-Louis_Danjon label "André Danjon".
- André-Louis_Danjon label "André Danjon".
- André-Louis_Danjon label "André Danjon".
- André-Louis_Danjon label "André-Louis Danjon".
- André-Louis_Danjon label "André-Louis Danjon".
- André-Louis_Danjon label "André-Louis Danjon".
- André-Louis_Danjon label "André-Louis Danjon".
- André-Louis_Danjon label "Данжон, Андре".
- André-Louis_Danjon label "アンドレ・ダンジョン".
- André-Louis_Danjon label "安德烈-路易·丹容".
- André-Louis_Danjon sameAs Andr%C3%A9-Louis_Danjon.
- André-Louis_Danjon sameAs André_Danjon.
- André-Louis_Danjon sameAs André-Louis_Danjon.
- André-Louis_Danjon sameAs André_Danjon.
- André-Louis_Danjon sameAs André-Louis_Danjon.
- André-Louis_Danjon sameAs アンドレ・ダンジョン.
- André-Louis_Danjon sameAs André_Danjon.
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- André-Louis_Danjon sameAs Q305958.
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- André-Louis_Danjon wasDerivedFrom André-Louis_Danjon?oldid=549906872.
- André-Louis_Danjon givenName "Andre".
- André-Louis_Danjon name "Andre Danjon".
- André-Louis_Danjon surname "Danjon".