Introduction of Gemini project

"It is the second manned space program in the United States, which was planned earlier. Officially announced on February 7th 196 1. At that time, the Apollo manned moon landing program was already being implemented. The purpose of Gemini program is to further serve the manned moon landing on the basis of project mercury. The main task is to study the long-term space flight under weightlessness, and to develop orbital maneuvers, rendezvous and docking technologies and astronauts' extravehicular activities. 1 The main objectives of Gemini include: 1. Committed to two-person and long-term flight, preparing for landing on the moon or entering further deep space in the future; 2. Effective orbital rendezvous and docking with other spacecraft in orbit; 3. Improve the reentry and landing methods of spacecraft; 4. Get further information about astronauts in weightlessness environment and record their physiological reactions in long-term flight.