Ejnar Hertzsprung
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Ejnar Hertzsprung was a Danish chemist and astronomer.
Hertzsprung (right) and Karl Schwarzschild in front of the Göttingen Observatory building (1909)
Karl Schwarzschild
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Karl Schwarzschild was a German physicist and astronomer.
Karl Schwarzschild
Schwarzschild, third from left in the automobile; possibly during the Fifth Conference of the International Union for Co-operation in Solar Research, held in Bonn, Germany
Karl Schwarzschild's grave at Stadtfriedhof (Göttingen)
Schwarzschild at the Fourth Conference International Union for Cooperation in Solar Research at Mount Wilson Observatory, 1910