At that time, Armstrong was the commander of the mission, Aldrin was the pilot of the lunar module. This small spacecraft was separated from the command module (main spacecraft) when landing on the moon, and the third crew member, michaeljohn collins, was ordered to stay in the command module and fly around the moon. Aldrin stepped on the surface of the moon 0/9 minutes after Armstrong landed on the moon, becoming the second hero to step on the moon. They spent 2 1 hour on the moon, 2 1 took off from the moon and returned to earth on 24th. By 2006, there were 12 people on the moon in American history.