How do astronauts return to Earth from space?

Astronauts return to earth in space through the spacecraft return capsule.

There are regular space shuttles or spaceships that transport materials to the space station, transport garbage back to Earth and transport astronauts back and forth. Because the space station has no ability to return to earth.

The technology of spacecraft re-entry and safe return is also very important. Especially for the spacecraft, in addition to limiting the braking overload of the spacecraft in the return process to the human capacity, it should also make its landing accuracy higher than that of the returning satellite in order to find and rescue astronauts in time.

When the spacecraft returns to Earth, the on-board engine of the return module provides reverse thrust, which makes the return module leave the orbital module and accelerate its landing on the earth's surface under the action of gravity. When the atmosphere is dense, open the parachute to slow down and land safely.

Brief introduction of astronauts

Cosmonaut, the full name of an astronaut, refers to a person who takes space flight as his occupation or has flown in space. The criteria for determining space flight are not completely uniform. In the United States, people who travel above 80 kilometers (50 miles) above sea level are called astronauts.

Space flight defined by the International Aviation Federation needs to exceed 100 km. By April 2004, 18, there were 440 people according to the definition of * * * in the United States. I spent 27,082 days in space and walked in space for 98 days.

According to the definition of the International Aviation Federation, only 434 people are eligible. The astronauts who went into space came from at least 32 countries. In Hong Kong and Southeast Asia, astronauts are also called astronauts. As of 20 13, only the former Soviet Union/Russia, the United States and China have the ability to launch manned space missions. Astronauts from other countries need to cooperate with the above three countries to complete manned space missions. Since the first human flight in 196 1, astronauts from 38 countries have flown successively.

Refer to the above content: Baidu Encyclopedia-Astronaut