What is the purpose of Gemini project?

1963 in may, the United States began the Gemini program, with the purpose of studying the technology necessary for human landing on the moon and testing the endurance of human flight in space.

Gemini spacecraft made 12, launched by Hercules -2 rocket, with a height of 27 meters, a weight of 136 tons and a thrust of 35 tons.

The first two Gemini spacecraft were not manned, and the purpose was to conduct flight tests on the Hercules -2 rocket and Gemini spacecraft. 1 was launched into orbit on April 8, 1964, and on April 2, 1965 1 month. Two unmanned spacecraft launch and re-entry tests show that the rocket performance is stable and the spacecraft can withstand the test of returning to Earth.

1965, a * * * launched five Gemini spacecraft into orbit, mainly to gradually extend the flight time. The longest flight time of "project mercury" was one and a half days, but it was extended to four days for Gemini 4, eight days for Gemini 5 and 14 days for Gemini 7, which was an amazing record at that time. This shows that human beings can completely ban long-term space flight to the moon.

In addition, the Gemini manned flight in 1965 also tested astronauts' extravehicular flight and spacecraft formation flight. /kloc-0 was launched on June 3rd, 965, and the 4th flew for four days, circling the earth 62 times. In the second lap, White used the jet thrust of the spray gun to "walk" in outer space for 20 minutes, chatting, joking and taking photos in space. "Spacewalk" not only tests the working ability of astronauts in space, but also tests the safety of spacesuits.

The first formation flight was carried out by No.6 and No.7, 19651February 4th. The target flew for two weeks, and No.7 was launched into orbit. The astronauts are Bowman and Raphael. 1 1 days later,1February 15, No.6 was successfully launched into orbit. Six hours after the launch, No.6 flew four times, only 30 meters away from No.7. Then, the spacecraft No.6 gradually approached No.7, and the closest approach distance was 1 meter. Astronauts of two spaceships can see each other's faces through the windows. In the next five and a half hours, the two spacecraft kept a distance of several meters, flying in formation and circling the earth four times. The next day, No.6 returned to the ground first, No.7 continued to complete the goal of flying 14 hours, and then returned to Earth.

1966, Gemini 5 spacecraft was successfully launched, focusing on testing spacesuits, rendezvous and docking technology and astronauts' ability to operate the spacecraft.

1March, 966 16, the unmanned spacecraft "Aquinas b" was launched into orbit for the first time, and then Gemini 8 was put into orbit. The astronauts are Armstrong and Scott.

As soon as No.8 entered orbit, it went after the spaceship "Akina B". After flying four times, he finally got close to it. Under the control of astronauts, the nose of Chang 'e-8 was successfully inserted into the docking port of "Aquinas B", which was the first successful docking. However, not long after docking, one of the attitude-controlled rockets on the 8 th ignited by mistake and sprayed air rapidly, causing the spacecraft to jump and turn around. After receiving the order to return to the ground, Armstrong calmly managed to separate the spacecraft from "Aquinas B" and then successfully returned to Earth. They flew in space for less than a day.

1June 3, 966, the ninth spacecraft was launched into orbit. The astronauts are Stafford and Cernan. They piloted the spacecraft to rendezvous with a target in three different ways, without docking test, because the docking port of the target was not exposed from the protective cover. Before returning to Earth, on June 6th, Cernan "walked" in space for 128 minutes to test the reliability of the spacesuit and human activity ability in space.

1July, 966 18, John Yang and Collins took the No.10 spaceship for three days. They first joined their target "Aquinas B", and then caught up with the No.8 target and joined them. Finally, they docked with their "Aquinas B". In this flight, Collins left the cabin twice, which took 87 minutes.

1September 1966 12, 1 1 was launched into orbit. The astronauts are Conrad and Gordon. They flew for nearly three days. They first docked with a Aquinas, and then started the main rocket engine on Aquinas, pushing the docking body to a higher orbit. Gordon leaves the cabin for 44 minutes and opens the hatch cover 130 minutes.

The Gemini spacecraft/KOOC-0/2 launched for the last time entered orbit on/KOOC-0/966/KOOC-0/month/KOOC-0/KOOC-0/day. First, the rendezvous and docking test was carried out. Then Aldrin left the cabin 149 minutes, opened the hatch cover twice, and took photos in space with his body half exposed. In this way, Aldrin spent five and a half hours in space.

Gemini project is a sub-plan of Apollo project. 10 manned flights completed their respective flight purposes, tested the endurance of people walking in space and flying for a long time, and improved the spacesuit. At the same time, it also tested the ground facilities and aerospace engineering management team, which is a wonderful page of the Apollo program.