Mary Jackson, African-American mathematician and aerospace engineer (died 2005)

Mary Jackson was an American mathematician and aerospace engineer at the National Advisory Committee for Aeronautics (NACA), which in 1958 was succeeded by the National Aeronautics and Space Administration (NASA). She worked at Langley Research Center in Hampton, Virginia, for most of her career. She started as a computer at the segregated West Area Computing division in 1951. In 1958, after taking engineering classes, she became NASA's first black female engineer.

April 9 is the 99th day of the year in the Gregorian calendar; 266 days remain until the end of the year.