Dr Philip C. Keenan, décédé le 20 avril 2000, a mis au point la « classification MKK » pour la classification spectrale des étoiles (avec WW Morgan), qui est encore en usage aujourd'hui.
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Philip C. Keenan — (* 31. März 1908 in Bellevue, Pennsylvania; † 20. April 2000 in Columbus, Ohio ) war ein US amerikanischer Astronom. Philip C. Keenan erhielt in den Jahren 1929 und 1930 seine Bachelor und Master Abschlüsse an der University of Arizona. Er… … Deutsch Wikipedia
Keenan — is a male Irish name which means Ancient, Distant . Keenan is an anglicisation of the Irish name Cianáin . The Keenans were historians to the McGuire clan.According to the United States Social Security Administration… … Wikipedia
Keenan — ist ein männlicher Vorname[1] und Familienname. Inhaltsverzeichnis 1 Herkunft und Bedeutung 2 Namensträger 2.1 Vorname 2.2 … Deutsch Wikipedia
Keenan, Philip Childs — ▪ 2001 American astronomer (b. March 31, 1908, Bellevue, Pa. d. April 20, 2000, Columbus, Ohio), developed with fellow astronomer William Wilson Morgan the influential MK (for Morgan Keenan) system for classifying stars by their luminosity… … Universalium
Keenan , Philip Childs — (1908–) American astronomer Keenan, who was born in Bellevue, Pennsylvania, graduated in 1929 from the University of Arizona and obtained his PhD from the University of Chicago in 1932. He worked initially at Chicago s Yerkes Observatory from… … Scientists
Classification de Morgan-Keenan — Classe de luminosité En astronomie, la classe de luminosité permet de distinguer les étoiles en fonction de leur luminosité, de même que le type spectral permet de les distinguer en fonction de leur température. En gros, la classe de luminosité… … Wikipédia en Français
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Spektralklasse — Hertzsprung Russell Diagramm Spektralklasse Braune Zwerge … Deutsch Wikipedia
Perkins Observatory — is an astronomical observatory in Delaware, Ohio. It is owned and operated by Ohio Wesleyan University.Early HistoryThe observatory is named for Hiram Perkins, a professor of mathematics and astronomy at the Ohio Wesleyan University in Delaware,… … Wikipedia
