Hertzsprung–Russell diagram

noun Hertz·sprung–Rus·sell diagram \ˈhertˌspru̇ŋˈrəsəl-\

Definition of Hertzsprung–Russell diagram

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Origin and Etymology of hertzsprung–russell diagram

after Ejnar Hertzsprung †1967 Danish astronomer and Henry Norris Russell †1957 American astrophysicist

First Known Use: 1939

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a rounded knoll or a ridge of ice

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