What jobs do astronauts need to do?

1, when the spacecraft has a hardware failure, the astronauts need to check and repair it to be able to keep the spacecraft functioning properly.

2. When the spacecraft's automated systems are ineffective, astronauts need to successfully return to Earth through manual operations. Astronauts are able to recognize the feedback information from various instruments on the spacecraft clearly and have accurate judgment on the information, and make correct response at the same time.

3. When the spacecraft's contact with the ground is compromised, the astronaut can complete the mission alone and return to the ground by operating the spacecraft autonomously. Astronauts can take the initiative to participate in a certain modification of the spacecraft, which can make the spacecraft more reasonable and comfortable to drive.

Expanded:

< p>Astronauts are carefully selected by the world's space agencies. The specifics of astronaut selection are determined according to the equipment of the spacecraft, space mission, etc., and are generally categorized into four areas.

1, the basic conditions: the same as the pilot selection, but the cultural level and work ability requirements are higher.

2, medical selection: in addition to following the medical selection conditions of pilots, but also in the past history of attention to the presence of hidden neuro-endocrine system dysfunction. In the physical examination must be comprehensive and detailed examination of the cardiovascular system, vestibular function and visual system.

3, psychological selection: heart quality selection is an important aspect of astronaut selection, to find out the examinee's character, emotional stability, mental state, and people **** things adaptability and coordination.

4, space special environment endurance selection: in the early stage of manned spaceflight, people attach great importance to the special environment endurance selection, but with the continuous development of space technology and the gradual improvement of the environment within the manned spacecraft, some of the special environmental factors test, such as noise, vibration, temperature is no longer as the main content of the selection. The special environmental endurance selection mainly involves tests of weightlessness adaptability and re-adaptability after return, such as vestibular function examination and low-pressure hypoxia endurance examination.

Reference:

Baidu Encyclopedia -Astronaut