Apollo was the spaceflight that landed the first humans on the Moon, Americans Neil Armstrong and Buzz Aldrin, on July 20, 1969.  Armstrong became the first to step onto the lunar surface six hours later.


Armstrong spent about two and a half hours outside the spacecraft. Aldrin spent slightly less. Together they collected 47 pounds (21 kg) of lunar material for return to Earth.


The third member of the mission, Michael Collins, piloted the command spacecraft alone in lunar orbit until Armstrong and Aldrin returned to it just under a day later for the trip back to Earth.