Asaph Hall (
October 15,
1829 –
November 22,
1907) was an
American astronomer who is most famous for having discovered the moons of
Mars (namely
Deimos and
Phobos) in
1877. He determined the orbits of
satellites of other planets and of
double stars, the rotation of
Saturn, and the mass of Mars.Hall was born in
Goshen, Connecticut. Apprenticed to a carpenter at 16, he later enrolled at the Central College in
McGrawville, New York. In
1856 he married
Angeline Stickney.In
1856, he took a job at the
Harvard College Observatory in
Cambridge, Massachusetts, and turned out to be an expert computer of orbits. Hall became assistant astronomer at the
US Naval Observatory in
Washington DC in
1862, and within a year of his arrival he was made professor.
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