Preparation for space travel is necessary for:

1. Ensuring the safety of the crew and the spacecraft.
2. Mastering the necessary skills to work in zero gravity.
3. Maintaining the physical and psychological training of the crew members.
4. Acquisition of knowledge on working with space equipment and systems.
5. Preparation for scientific experiments in space.
6. Develop mission plans, including work schedules, meals and sleep.
7. Mastering evacuation and rescue procedures in case of emergencies.
8. Improving the overall success and effectiveness of the mission.