When will the fifteen astronauts return?

After completing various tasks, the three astronauts of Shenzhou XV will embark on a journey back to Earth. According to the China Manned Space Engineering Office, the return time of Shenzhou XV has been confirmed as June 4th, when the Shenzhou XV return capsule will land at the Dongfeng landing site.

The specific return time can be inferred from the known information. Just like aiming at the time window when launching, Shenzhou XV should aim at the time window when returning, and the specific time depends on the orbital parameters of the space station and the location of the landing site. After the space and core module were launched into orbit, China launched Shenzhou 12. After completing its mission, Shenzhou 12 was evacuated from the Tianhe core cabin until it finally landed at the Dongfeng landing site. The whole return journey took 28 hours and 40 minutes.

The reasons for human space flight:

1, exploring the unknown:

There is a spirit of exploring the unknown in human nature. Space flight can take us into the universe, let us know more about the secrets of the universe and create our cognition and knowledge. Through space flight, we can further explore the unknown fields of the universe, the earth and mankind itself, and bring endless discoveries and challenges to mankind.

2. Scientific research:

Space research is of great significance to human scientific development, technological progress and human health. Space flight can provide a completely different experimental environment for human beings, which will help them to better understand their own world. More importantly, in the process of space flight, scientists can use various advanced technologies and tools to carry out experiments on scientific problems, which will play an important role in promoting the development of human science and technology.

3. National development:

Space technology is an important part of national development. The development of space technology makes the country in a leading position in exploring the universe, protecting the environment, improving the level of science and technology and developing the economy, and it is also one of the key factors to enhance its international status and competitiveness.

4. Protect the environment:

Space research also has a positive impact on protecting the earth's environment, because there are still many unknown problems in the earth's environment. For example, climate change, meteorological disasters, extreme weather, ecological environment and other issues can be detected and monitored in space research, thus bringing better protection to the earth's environmental protection.

5, open up new living space:

With the increase of population and the scarcity of resources, the living space on the earth is becoming more and more limited. Space technology can help people explore and find more living space on other planets or constellations and establish new bases, which is of great significance to the future development of mankind.