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Harper's Encyclopedia of United States History (ed. Benson Lossing), Hall, Asaph 1829- (search)
ry of Harvard College, where he served as assistant in 1857-62. In August of the latter year he was made aide in the United States Naval Observatory in Washington, and in the following year was appointed Professor of Mathematics with the relative rank of captain. In 1895 he became Professor of Astronomy at Harvard University. He has led many astronomical expeditions for the government, among them being that to Bering Sea, in 1869, to observe the solar eclipse, and that to Vladisvostok, Siberia, in 1874, to study the transit of Venus. His most important discovery, which won him great distinction, was that of the two moons of Mars, which he located in August, 1877, and which he named Deimos and Phobos (Terror and Fear). The Royal Astronomical Society of London awarded him its gold medal in 1879. In 1875 he became a member of the National Academy of Sciences, of which he was president in 1901. He has contributed articles to many astronomical journals in the United States and Europe.