This is called an HR Diagram, after Hertzsprung and Russell.
这被称为 HR 图，以 Hertzsprung 和 Russell 的名字命名。
Hertzsprung
原声例句
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Ejnar Hertzsprung
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Ejnar Hertzsprung (Danish pronunciation: [ɑjnɐ ˈhæɐ̯d̥sb̥ʁɔŋ], 8 October 1873 – 21 October 1967) was a Danish chemist and astronomer, born in Copenhagen, Denmark. In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram.
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