Boone

Digital Spectral Classification Atlas

"The MK Spectral classification system was founded by W. W. Morgan and P. C. Keenan in the year 1943, with the publication of the first photographic spectral classification atlas, 'An Atlas of Stellar Spectra' (Morgan, Keenan & Kellman 1943). Since that time, the MK system has been extensively revised and refined by Morgan, Keenan and others. In the late 1970's, two important spectral atlases, summarizing the development of the MK system up until that time, were published.

"The MK Spectral classification system was founded by W. W. Morgan and P. C. Keenan in the year 1943, with the publication of the first photographic spectral classification atlas, 'An Atlas of Stellar Spectra' (Morgan, Keenan & Kellman 1943). Since that time, the MK system has been extensively revised and refined by Morgan, Keenan and others. In the late 1970's, two important spectral atlases, summarizing the development of the MK system up until that time, were published.