1July 20, 969, at 4 pm EST, 17: 42, Armstrong carefully stepped on the surface of the moon with his left foot, which was the first time that man set foot on the moon. This is also the first time that the United States has landed on the moon.
Lunar landing process:
In addition to more than1million people at the launch site, a record 600 million people all over the world watched the live broadcast of the launch. President Nixon learned about the launch from the Oval Office of the White House. Saturn V rocket carrying Apollo 1 1 was launched on1July 96916th 13: 32 (UTC? At 9: 32 local time, it was launched from the Kennedy Space Center, and entered Earth orbit 12 minutes later. After a circle and a half around the earth, the third stage rocket ignited and the spacecraft began to sail for the moon. After 30 minutes, the command/service module was separated from Saturn 5 and connected to the lunar module adapter after turning? The lunar module is connected to). Lunar transfer orbit injection (TLI? ) shoot a spaceship at the moon.
Apollo 1 1 passed the back of the moon on July 19, and soon ignited the main rocket and entered the lunar orbit. During the flight around the moon, three astronauts determined the planned landing site in the air.
Apollo 1 1 landed in the sea of tranquility. ) South, in Sabine D? Ring Shanxi is 20 kilometers southwest. I chose this landing site because it is relatively flat (from Ranger 8? ), surveyor 5 (surveyor 5? ) and lunar orbiter (lunar orbiter? ), it will not cause too much difficulty in landing and extravehicular activities. After landing, Armstrong called the landing site "Jinghai Base".
Aldrin's shoe prints on the moon. This is part of the experiment to test the weathering layer on the surface of the moon. On July 20, when the spacecraft was on the back of the moon, the lunar module with the call sign "Eagle" was separated from the command module with the call sign "Colombia". Collins stayed alone on the Columbia and flew around the lunar module several times, checking carefully to make sure everything was all right. After the inspection, Collins made a simple farewell gesture-"Take care"-and left. Collins' mission is to stay in the command module and fly around the moon. For the next 24 hours, he can only listen to the communication between the control center and the eagle and pray that the moon landing will be successful. If the eagle has an accident and can't take off from the moon (which is very likely), Collins will have to return to Earth alone.
Soon, Armstrong and Aldrin started the eagle propeller and began to descend. They soon realized that it was "flying over the head": when they landed on the moon, the alarm indicating that the computer was overloaded began to sound. The eagle flew four seconds longer on the descent trajectory, which means that the moon landing site will be several kilometers west of the plan. The navigation computer has several abnormal programs to alarm. At the Johnson Space Center in Houston, flight control commander Steve Bales (Steve Bales? ) is faced with a crucial and instantaneous choice-to terminate the moon landing plan (which also means to terminate the entire flight plan, because the fuel on the plane is only enough for one attempt), or to order the astronauts to act according to the plan and ignore the problems in the computer of the lunar module. Bells later admitted that he allowed Armstrong to try to land on the moon "by instinct". After paying attention to the window again, Armstrong found that they were between a rock and a hard ground. Computer failure caused them to fly over the pre-selected landing zone, and the fuel would soon run out. At this point, Armstrong chose to manually control the lunar module. The lunar module kept descending, and the fuel began to run out-the lunar module was about 9 meters away from the surface of the moon, and the remaining fuel was only 30 seconds-Armstrong calmly found a suitable landing site on the surface of the moon covered with rubble and craters, and drove the lunar module to land on the moon smoothly. The exact landing time is July 20th, 0969 at 65438+4: 00pm (Houston time).
Saturn V was carrying Apollo11(1July 969 16). Armstrong and Aldrin looked at each other and smiled knowingly. The flight control center in Houston was silent, and everyone was waiting quietly. Finally, they heard Armstrong's voice: "Houston, this is the Jinghai base. The' Eagle' successfully landed. " The flight control center suddenly burst into a burst of warm cheers. In the lunar module, Armstrong and Aldrin put their hands on the dashboard and shook them silently.