English
Etymology
From w:Ejnar Hertzsprung|Ejnar Hertzsprung and w:Henry Norris Russell|Henry Norris Russell, astronomers
Noun
wikipedia
Hertzsprung-Russell diagram
#star: a plot of the absolute magnitude of stars versus their colour (or surface temperature); shows the main sequence of stars plus the white dwarfs and red giants
Category:English eponyms
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