Question: 12 astronauts who walked on moon?
Answer: Neil Armstrong (1930-2012)—Apollo 11.
Edwin "Buzz" Aldrin (1930-)—Apollo 11.
Charles "Pete" Conrad (1930-1999)—Apollo 12.
Alan Bean (1932-2018)—Apollo 12.
Alan B. Shepard Jr. ( ... 
Edgar D. Mitchell (1930-2016)—Apollo 14.
David R. Scott (1932-)—Apollo 15.
James B. Irwin (1930-1991)—Apollo 15.