Ejnar Hertzsprung
Ejnar Hertzsprung was a Danish chemist and astronomer, born in Copenhagen, Denmark. In the period 19111913, together with Henry Norris Russell, he developed the HertzsprungRussell diagram.
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Source: Wikipedia
Ejnar Hertzsprung was a Danish chemist and astronomer, born in Copenhagen, Denmark. In the period 19111913, together with Henry Norris Russell, he developed the HertzsprungRussell diagram.
NA
Source: Wikipedia