Samuel Pierpont Langley was an American aviation pioneer, astronomer and physicist who invented the bolometer. He was the third secretary of the Smithsonian Institution and a professor of astronomy at the University of Pittsburgh, where he was the director of the Allegheny Observatory.
- Occupation
- astronomer, aerospace engineer, astrophysicist, physicist
- Position held
- Secretary of the Smithsonian
- Citizenship
- United States
- Born
- August 22, 1834
- Died
- February 27, 1906
