Aug. 11, 1877: Asaph Hall discovers Deimos

After spending the 1850s at Harvard Observatory calculating orbits, Asaph Hall became an assistant at the U.S. Naval Observatory at Washington, D.C., in 1862. He was quickly promoted, and by 1873 had not only held several scientific discussions with Abraham Lincoln during the president’s visits to the observatory, but had also been put in chargeContinue reading “Aug. 11, 1877: Asaph Hall discovers Deimos”
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