What are the functions of satellites and manned spacecraft?

Satellite function: The moon is the natural satellite of the earth. It can balance the earth's rotation, stabilize the earth's axis, control tides, observe time, and imagine many beautiful legends.

Manned spacecraft function: as a shuttle between heaven and earth, it transports astronauts to and from the space station. Astronauts on the former Soviet Union/Russia Salute Space Station and Mir Space Station were picked up by Soyuz manned spacecraft. The main vehicle of the International Space Station is also a spaceship.

Flying in low earth orbit; Testing various manned space technologies; Such as orbital rendezvous and docking, astronauts leaving the cabin and entering space; Investigate the effects of weightlessness in orbit and space radiation on human body; Developing space medicine; Shuttle people and transport materials for the space station; Using various remote sensing equipment to observe the earth; Conduct space exploration and astronomical observation; Fly to the moon or interstellar flight.

Extended data:

Manned spacecraft can carry out space activities independently, can also be used as a "ferryman" between the ground and the space station, and can also dock with the space station or other spacecraft for joint flight. The manned spacecraft is small in size, limited by the amount of consumable materials it carries, and cannot be replenished and reused. ?

Manned spacecraft, also known as manned spacecraft, is launched into space by means of launch vehicles, orbiting the earth or orbiting; There is an artificial environment suitable for people's work and life in the spacecraft; After completing the mission, part of the spacecraft returned to the atmosphere and made a soft landing with parachutes and buffers.

Sputnik is a prosperous family. According to the purpose, it can be divided into three categories: scientific satellites, technical experimental satellites and applied satellites. Scientific satellites are satellites used for scientific exploration and research, mainly including space physics exploration satellites and astronomical satellites. They are used to study the atmosphere, radiation belt, magnetosphere, cosmic rays and solar radiation of a planet, and also to observe other planets. At present, most artificial satellites in the world are artificial earth satellites.

The source of angular momentum of satellite system is the same as that of planetary rotation. However, when considering the formation of satellites, it must be analyzed as the formation process of planetary systems.

In the process of contraction, the original star embryo of the planetary system will form a rotating sphere for the same reason as when the planetary system was formed. This sphere will gradually become a flat nebula disk in the process of shrinking to its own gravity center, forming a planetary body in the central part of the nebula disk and a satellite in the peripheral part of the nebula disk, which is considered in two cases.

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