News Did you know that....   James D. Wetherbee     2 June 2006   The tallest astronaut to fly in space was American Jim Wetherbee, who was 1.93 m (6 feet 4 inches) high.           Nancy J. Currie   The shortest was American astronaut, Nancy Currie, who measured just 1.52 m (5 feet).       John Herschel Glenn     The oldest person to fly in space was 77 year-old American John Glenn.         Gherman Titov   The youngest was 25 year-old Russian, Gherman Titov.