Charles Moss "Charlie" Duke, Jr. (born October 3, 1935) is a retired US Air Force brigadier general, and a former United States astronaut for NASA. As Lunar Module pilot for Apollo 16 in 1972, he became the tenth and youngest person to walk on the Moon.A former test pilot, Duke has logged 4,147 hours flying time, which includes 3,632 hours in jet aircraft; and 265 hours in space, plus 21 hours and 28 minutes of extra-vehicular activity.A resident of New Braunfels, Texas, he is currently chairman of the board of directors of the Astronaut Scholarship Foundation.