Aldrin set foot on the Moon at 03:15:16 on July 21, 1969 (UTC), nineteen minutes after Armstrong originally contacted the surface. Armstrong and Aldrin turned into the first and second individuals, separately, to stroll on the Moon.
Conceived: Edwin Eugene Aldrin Jr. January 20, 1930
Time in space: 12 days 1 hour and 53 minutes
more detail
This article is about the 1969 crewed lunar mission. For other uses, see Apollo 11 (disambiguation).
Apollo 11
Aldrin Apollo 11 original.jpg
Buzz Aldrin on the Moon as photographed by Neil Armstrong (Armstrong seen in the visor reflection)
Mission type Crewed lunar landing (G)
Operator NASA
COSPAR ID
CSM: 1969-059A
LM: 1969-059C
SATCAT no.
CSM: 4039[1]
LM: 4041[2]
Mission duration 8 days, 3 hours, 18 minutes, 35 seconds
Spacecraft properties
Spacecraft
Apollo CSM-107
Apollo LM-5
Manufacturer
CSM: North American Rockwell
LM: Grumman
Launch mass 100,756 pounds (45,702 kg)
Landing mass 10,873 pounds (4,932 kg)
Crew
Crew size 3
Members
Neil A. Armstrong
Michael Collins
Edwin E. Aldrin Jr.
Callsign
CSM: Columbia
LM: Eagle
On surface: Tranquility Base
Start of mission
Launch date July 16, 1969, 13:32:00 UTC[3]
Rocket Saturn V SA-506
Launch site Kennedy Space Center LC-39A
End of mission
Recovered by USS Hornet
Landing date July 24, 1969, 16:50:35 UTC
Landing site
North Pacific Ocean
13°19′N 169°9′W
Orbital parameters
Reference system Selenocentric
Periselene altitude 100.9 kilometers (54.5 nmi)[4]
Aposelene altitude 122.4 kilometers (66.1 nmi)[4]
Inclination 1.25 degrees[4]
Period 2 hours[4]
Epoch July 19, 1969, 21:44 UTC[4]
Lunar orbiter
Spacecraft component Command and service module
Orbital insertion July 19, 1969, 17:21:50 UTC[5]
Orbital departure July 22, 1969, 04:55:42 UTC[6]
Orbits 30
Lunar lander
Spacecraft component Apollo Lunar Module
Landing date July 20, 1969, 20:17:40 UTC[7]
Return launch July 21, 1969, 17:54:00 UTC[8]
Landing site
Tranquility Base,
Mare Tranquillitatis
0.67408°N 23.47297°E[9]
Sample mass 21.55 kilograms (47.51 lb)
Surface EVAs 1
EVA duration 2 hours, 31 minutes, 40 seconds
Docking with LM
Docking date July 16, 1969, 16:56:03 UTC[5]
Undocking date July 20, 1969, 17:44:00 UTC[10]
Docking with LM ascent stage
Docking date July 21, 1969, 21:35:00 UTC[6]
Undocking date July 21, 1969, 23:41:31 UTC[6]
Circular insignia: eagle with wings outstretched holds olive branch on Moon with Earth in background, in blue and gold border. Apollo 11 crew
Left to right: Neil Armstrong, Michael Collins, Buzz Aldrin
Apollo program
← Apollo 10Apollo 12 →
Apollo 11 was the spaceflight that first landed humans on the Moon. Commander Neil Armstrong and lunar module pilot Buzz Aldrin formed the American crew that landed the Apollo Lunar Module Eagle on July 20, 1969, at 20:17 UTC (14:17 CST). Armstrong became the first person to step onto the lunar surface six hours and 39 minutes later on July 21 at 02:56 UTC; Aldrin joined him 19 minutes later. They spent about two and a quarter hours together outside the spacecraft, and they collected 47.5 pounds (21.5 kg) of lunar material to bring back to Earth. Command module pilot Michael Collins flew the Command Module Columbia alone in lunar orbit while they were on the Moon's surface. Armstrong and Aldrin spent 21 hours, 36 minutes on the lunar surface at a site they named Tranquility Base before lifting off to rejoin Columbia in lunar orbit.
Apollo 11 was launched by a Saturn V rocket from Kennedy Space Center on Merritt Island, Florida, on July 16 at 13:32 UTC, and it was the fifth crewed mission of NASA's Apollo program. The Apollo spacecraft had three parts: a command module (CM) with a cabin for the three astronauts, 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.
After being sent to the Moon by the Saturn V's third stage, the astronauts separated the spacecraft from it and traveled for three days until they entered lunar orbit. Armstrong and Aldrin then moved into Eagle and landed in the Sea of Tranquility on July 20. The astronauts used Eagle's ascent stage to lift off from the lunar surface and rejoin Collins in the command module. They jettisoned Eagle before they performed the maneuvers that propelled Columbia out of the last of its 30 lunar orbits onto a trajectory back to Earth.[6] They returned to Earth and splashed down in the Pacific Ocean on July 24 after more than eight days in space.
Armstrong's first step onto the lunar surface was broadcast on live TV to a worldwide audience. He described the event as "one small step for [a] man, one giant leap for mankind".[a][12] Apollo 11 effectively ended the Space Race and fulfilled a national goal proposed in 1961 by President John F. Kennedy: "before this decade is out, of landing a man on the Moon and returning him safely to the Earth."[1
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