Hertzsprung, Ejnar (1873–1967)
Hertzsprung studied chemical engineering in Copenhagen, worked as a chemist in St. Petersburg, and studied photochemistry in Leipzig before returning to Denmark in 1901 to become an independent astronomer. In 1909 he was invited to Göttingen to work with Karl Schwarzschild, whom he accompanied to the Potsdam Astrophysical Observatory later that year. From 1919 to 1944 he worked at the Leiden Observatory in the Netherlands, the last nine years as director. He then retired to Denmark but continued measuring plates into his nineties.
Adapted in part from the biographical entry at The Bruce Medalists website
Related category• ASTRONOMERS AND ASTROPHYSICISTS
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