John Asher Johnson
American astronomer
- Born
- 4 January 1977, St. Louis
- Age
- 49
John Asher Johnson is an American astrophysicist and professor of astronomy at Harvard. He is the first tenured African-American physical science professor in the history of the university. Johnson is well known for discovering three of the first known planets smaller than the Earth outside of the Solar System, including the first Mars-sized exoplanet.
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