Definition: Meaning of, Hertzsprung-Russell diagram in English to English dictionary.
Pronunciation:/ ˈrʌs(ə)l ˈdʌɪəɡram /
noun
synonym
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Singular
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Hertzsprung-Russell diagram
Hertzsprung-Russell diagrams
or effective temperatureastronomy a plot of the absolute magnitude of stars versus their colour ; shows the main sequence of stars plus the white dwarfs and red giants