. On this day in 1837 – March 7th – Henry Draper was born.
Henry Draper was a pioneer of astrophotography. Following his early death, his wife Anna donated money to Harvard College Observatory to complete his catalogue of stellar spectra. If you see a deep sky object named with an "HD" prefix, it refers to this catalogue.
. On this day in 1804 – March 8th – American astronomer and telescope maker Alvan Clark was born in Ashfield, Massachusetts.
In 1846 he founded Alvan Clark & Sons, which made astronomical telescopes and instruments. Notably, the company made the lenses for large refracting telescopes at Lick Observatory and Yerkes Observatory.
. On this day in 1835 – March 12th – Canadian-American mathematician and astronomer Simon Newcomb was born.
Newcomb made important contributions to international timekeeping and other fields in applied mathematics such as economics and statistics. He was a professor at the United States Naval Observatory and at Johns Hopkins.
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