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- Philip_Childs_Keenan abstract "Philip Childs Keenan (March 31, 1908 – April 20, 2000) was an American astronomer.Keenan was an American spectroscopist who collaborated with William Wilson Morgan and Edith Kellman (1911–2007) to develop the MKK stellar spectral classification system between 1939 and 1943. This two-dimensional classification system (temperature & luminosity) was further revised by Morgan and Keenan in 1973. The MK system remains the standard stellar spectral classification system used by astronomers today.During their long collaboration, Keenan tended to focus his research on stars cooler than the Sun, while Morgan emphasized the hotter stars. Keenan had a long and productive career, publishing his final scientific paper in 1999, seventy years after his first.".
- Philip_Childs_Keenan birthPlace Bellevue,_Pennsylvania.
- Philip_Childs_Keenan birthPlace Pennsylvania.
- Philip_Childs_Keenan deathDate "2000-04-20".
- Philip_Childs_Keenan deathPlace Columbus,_Ohio.
- Philip_Childs_Keenan deathPlace Ohio.
- Philip_Childs_Keenan field Astronomer.
- Philip_Childs_Keenan nationality United_States.
- Philip_Childs_Keenan viafId "104697070".
- Philip_Childs_Keenan wikiPageExternalLink 10.1146%2Fannurev.aa.11.090173.000333.
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- Philip_Childs_Keenan wikiPageExternalLink philip-c-keenan-92-pioneer-in-the-classification-of-stars.html?scp=2&sq=philip+keenan&st=nyt.
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- Philip_Childs_Keenan birthPlace "Bellevue, Pennsylvania, USA".
- Philip_Childs_Keenan deathDate "2000-04-20".
- Philip_Childs_Keenan deathPlace "Columbus, Ohio, USA".
- Philip_Childs_Keenan field Astronomer.
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- Philip_Childs_Keenan name "Philip Childs Keenan".
- Philip_Childs_Keenan nationality United_States.
- Philip_Childs_Keenan workInstitutions Perkins_Observatory.
- Philip_Childs_Keenan workInstitutions Yerkes_Observatory.
- Philip_Childs_Keenan subject Category:1908_births.
- Philip_Childs_Keenan subject Category:2000_deaths.
- Philip_Childs_Keenan subject Category:American_astronomers.
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- Philip_Childs_Keenan comment "Philip Childs Keenan (March 31, 1908 – April 20, 2000) was an American astronomer.Keenan was an American spectroscopist who collaborated with William Wilson Morgan and Edith Kellman (1911–2007) to develop the MKK stellar spectral classification system between 1939 and 1943. This two-dimensional classification system (temperature & luminosity) was further revised by Morgan and Keenan in 1973.".
- Philip_Childs_Keenan label "Philip C. Keenan".
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- Philip_Childs_Keenan name "Philip Childs Keenan".