On Oct. 8, 1873, Ejnar Hertzsprung was born near Copenhagen, Denmark. His father had studied astronomy and worked in finance, and Hertzsprung himself showed interest in astronomy and math, but pursued a degree in chemical engineering. After graduating from the Polytechnical Institute in Copenhagen, he worked as a chemist in St. Petersburg, Russia, and wentContinue reading "Oct. 8, 1873: The birth of Ejnar Hertzsprung"
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