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Harvard classification

a classification of stars based on the characteristic spectral absorption lines and bands of the chemical elements present See spectral type
Word Origin
C20: named after the observatory at Harvard, Massachusetts, where it was prepared and published as part of The Henry Draper Catalogue (1924)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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