A professor of math...........at the US Naval academy........in Annapolis, MD.................astrophysics............connection to PA's 2nd city.........Pittsburgh...........on the Ohio river.........one of 3 rivers.......................for a 3rd director..............



a professor of mathematics at the United States Naval Academy, but actually was sent there to restore the Academy's small observatory. In 1867, he became the director of the Allegheny Observatory and a professor of astronomy at the Western University of Pennsylvania, now known as the University of Pittsburgh, a post he kept until 1891 even while he became the third Secretary of the Smithsonian Institution in 1887. Langley was the founder of the Smithsonian Astrophysical Observatory.