What is the design purpose of Gemini spacecraft?

American manned spacecraft series. From March 1965 to June 1966,165438+1October * * * carried out 10 manned flights. The main purpose is to carry out maneuvering flight, rendezvous and docking and astronauts' extravehicular activities in orbit, and make technical preparations for the manned landing of Apollo spacecraft on the moon. Gemini spacecraft weighs about 3.2 ~ 3.8 tons, with a maximum diameter of 3 meters, and consists of two parts: cockpit and equipment cabin. The cockpit is divided into sealed and unsealed parts. The capsule is equipped with display equipment, control equipment, waste disposal device and two ejection seats for two astronauts, with food and water. Radio equipment, life support system and parachute are installed in unsealed cabin. There are radar and rendezvous and docking devices at the front end of the cockpit, and the bottom of the cockpit is covered with heat-proof materials. The equipment cabin is divided into upper cabin and lower cabin. The four brake engines are mainly installed in the upper cabin. In the lower cabin, there are orbital engines and their fuels, orbital communication equipment, fuel cells, etc. There are many pipes flowing coolant in the inner wall of the equipment cabin, so the equipment cabin is also a space radiator. Before returning, the spacecraft abandoned the equipment cabin and lowered it, then ignited four brake rockets, and then abandoned the equipment cabin and the upper cabin. The cockpit was put into the atmosphere, and when it descended to low altitude, the parachute opened and the astronauts landed on the sea with the cockpit.