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Hall, Asaph 1829-
Astronomer; born in Goshen, Conn., Oct. 15, 1829; received a common-school education; worked on a farm; and later became a carpenter.
In 1853 he took up the study of geometry and algebra; subsequently pursued special courses in the University of Michigan, and afterwards entered the observatory 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 whi