Hertzsprung-Russell diagram

noun

Hertz·​sprung-Rus·​sell diagram

ˈhertˌspru̇ŋˈrəsᵊl-

: spectrum-luminosity diagram

Word History

Etymology

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

First Known Use

1939, in the meaning defined above

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