Buzz Aldrin was an astronaut.
Apollo 11 . Mission commander Neil Armstrong and pilot Buzz Aldrin , both American , landed the lunar module Eagle on July 20 , 1969 , at 20:18 UTC . After being sent toward the Moon by the Saturn V 's upper stage , the astronauts separated the spacecraft from it and traveled for three days until they entered into lunar orbit . Buzz Aldrin ( born Edwin Eugene Aldrin Jr. , January 20 , 1930 ) is an American engineer and former astronaut . As the Lunar Module Pilot on Apollo 11 , he was one of the first two humans to land on the Moon , and the second person to walk on it .