The people who have walked on the moon

The thing I learned today is that twelve men have walked on the moon.  Neil Armstrong was the first man on the moon, followed immediately by Buzz Aldrin; this was on July 21, 1969.  The next two moon walkers were Pete Conrad and Alan Bean, who trod the dusty surface of Luna November 19 and 20, 1969, as part of the Apollo 12 mission.  And the fifth and sixth on the moon were Alan Shepherd and Edgar Mitchell, who walked the moon in February of 1971.  The last person to have walked on the moon (for now!) is Eugene Cernan, in 1972.  Here is a mnemonic: Arm All Conquering Bears; Sheep Might Scamper.