Robert L. Forward, American physicist and science fiction author (born 1932)

Robert Lull Forward was an American physicist and science fiction writer. His literary work was noted for its scientific credibility and use of ideas developed from his career as an aerospace engineer. He also made important contributions to gravitational wave detection research.

September 21 is the 264th day of the year in the Gregorian calendar; 101 days remain until the end of the year.