单词 | Harvard classification |
释义 | Harvard classification/ˈhɑːvəd![]() noun Astronomy A system of classification of stars based on their spectral types, the chief classes (O, B, A, F, G, K, M) forming a series from very hot bluish-white stars to cool dull red stars.Stars are given a Harvard classification according to the dominant element found in their spectra and the classes are ordered according to their surface temperature....
Origin1960s: named after the observatory at Harvard University, where it was devised. |
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