Explanation

Following 12 people walked on the Moon till 2021

1.       Neil Armstrong (1930-2012)—Apollo 11

2.       Edwin "Buzz" Aldrin (1930-)—Apollo 11

3.       Charles "Pete" Conrad (1930-1999)—Apollo 12

4.       Alan Bean (1932-2018)—Apollo 12

5.       Alan B. Shepard Jr. (1923-1998)—Apollo 14

6.       Edgar D. Mitchell (1930-2016)—Apollo 14

7.       David R. Scott (1932-)—Apollo 15

8.       James B. Irwin (1930-1991)—Apollo 15

9.       John W. Young (1930-2018)—Apollo 10 (orbital), Apollo 16 (landing)

10.   Charles M. Duke (1935-)—Apollo 16

11.   Eugene Cernan (1934-2017)—Apollo 10 (orbital), Apollo 17 (landing)

12.   Harrison H. Schmitt (1935-)—Apollo 17