An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Morgan-Keenan classification
  رده‌بندی ِ مورگان-کینان  
radebandi-ye Morgan-Keenan (#)
Fr.: classification de Morgan-Keenan  

A system of → spectral classification introduced in 1943 by William W. Morgan (1906-1994), Philip C. Keenan (1908-2000), and Edith M. Kellman (1911-2007) at Yerkes Observatory. Also known as the MK (or MKK) classification or the → Yerkes system.

Etymology (EN): Named after the two main astronomers, as above; → classification.