Neil Armstrong and Edwin 'Buzz' Aldrin became the first men to walk on the moon 51 years ago today

Astronaut Edwin "Buzz" Aldrin walks on the moon during the Apollo 11 mission.

(CNN)History was made on this day more than half a century ago when two American astronauts walked on the moon.

A mission many doubted was possible became reality for Neil Armstrong -- the first man to walk on the moon -- and Edwin "Buzz" Aldrin, who joined him 19 minutes later.
Here are some facts about what happened 51 years ago Monday:

      World watched history unfold

        Apollo 11 became the first manned spacecraft to land on the moon.
          At 9:32 a.m. ET, July 16, 1969, Apollo 11 launched from Florida on its mission to the moon.