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Ejnar Hertzsprung
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Ejnar Hertzsprung
Ejnar Hertzsprung
(, 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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