<Tr> <Th> Undocking date </Th> <Td> July 21, 1969, 23: 41: 31 UTC </Td> </Tr> <Tr> <Td_colspan="2"> <P> </P> Left to right: Neil Armstrong, Michael Collins, Buzz Aldrin Apollo program ← Apollo 10 Apollo 12 → </Td> </Tr> <P> Apollo 11 was the spaceflight that landed the first two people on the Moon . Mission commander Neil Armstrong and pilot Buzz Aldrin, both American, landed the lunar module Eagle on July 20, 1969, at 20: 17 UTC . Armstrong became the first person to step onto the lunar surface six hours after landing on July 21 at 02: 56: 15 UTC; Aldrin joined him about 20 minutes later . They spent about two and a quarter hours together outside the spacecraft, and collected 47.5 pounds (21.5 kg) of lunar material to bring back to Earth . Michael Collins piloted the command module Columbia alone in lunar orbit while they were on the Moon's surface . Armstrong and Aldrin spent 21.5 hours on the lunar surface before rejoining Columbia in lunar orbit . </P> <P> Apollo 11 was launched by a Saturn V rocket from Kennedy Space Center on Merritt Island, Florida, on July 16 at 9: 32 am EDT (13: 32 UTC) and was the fifth manned mission of NASA's Apollo program . The Apollo spacecraft had three parts: a command module (CM) with a cabin for the three astronauts, and the only part that returned to Earth; a service module (SM), which supported the command module with propulsion, electrical power, oxygen, and water; and a lunar module (LM) that had two stages--a descent stage for landing on the Moon, and an ascent stage to place the astronauts back into lunar orbit . </P>

How many astronauts were a part of apollo 11’s crew
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