After more than five months, the Shenzhou 13 crew of "space travel" ushered in the countdown of "going home"! According to the China Manned Space Engineering Office, the Shenzhou 13 manned spacecraft has completed all its scheduled tasks and will choose an opportunity to evacuate the core module assembly of the space station and return to the Dongfeng landing site in the near future. At present, the Shenzhou 13 crew has made various preparations before the evacuation of the spacecraft, and the Dongfeng landing site and engineering related systems are carrying out various preparations for the return of astronauts. What "specialties" do they want to bring home soon? What was the first quick return scheme adopted by Shenzhou XIII? How fast is it? Read a text! On October 16, 2021, astronauts Zhai Zhigang, Wang Yaping and ye Guangfu entered the Tianhe core module aboard Shenzhou 13 manned spacecraft at Jiuquan Satellite Launch Center, becoming the second batch of astronauts to enter the Chinese space station. Shenzhou 13 flight crew During the 180 day space flight, the three astronauts successfully completed two extravehicular activities and two "Tiangong classroom" space teaching activities with the support of ground scientific and technological personnel, and carried out a number of scientific and technological experiments and application projects. Wang Yaping became the first female astronaut in China to carry out extravehicular activities. For the first time, the astronauts completed the docking between the cargo spacecraft and the space station through remote operation in orbit. The flight crew set a new record for the continuous duration of Chinese astronauts in orbit. There are these preparations before going home The three astronauts of Shenzhou 13 have worked and lived in the space station for more than five months. According to the plan, they will work and live in orbit for about 180 days. Now they are entering the preparation stage for return, and the three astronauts of the space station are also preparing for "going home". In the "package" returning to the earth, there are all kinds of "space specialties". Some scientific experiments carried out in orbit need to bring samples and data back to the ground for further research. In addition to packing their luggage, the astronauts also have to give the space station a thorough "clean-up". Among them, all kinds of garbage and waste need to be transferred to the orbital module, and then fall into the atmosphere with the orbital module and burn up. All kinds of work and life items transported by Tianzhou 3 should also be "returned to the original place", and the products and equipment should be placed in advance to prepare for a new batch of visitors. Shenzhou 13 will adopt the "rapid return scheme" for the first time It is understood that Shenzhou 13 will adopt the "rapid return scheme" for the first time. What is the "quick return program"? Take Shenzhou 12 as an example. From the separation of the spacecraft from the core module to the final return to the ground, the astronauts will take about 28 hours. Because previously, when the manned spacecraft returned to the earth's surface, it was first necessary to separate the manned spacecraft from the space station cabin, and then it did not return directly, but would enter a long intermediate preparation process of more than 24 hours. After Shenzhou 12 spacecraft separated from the core module, the first test was the radial rendezvous test. It flew around the lower part of the core module and gradually approached the radial interface of the core module from bottom to top to verify various technologies of radial rendezvous and docking. After completion, the spacecraft flew around to the front of the core module, which lasted about 4.5 hours. After that, Shenzhou 12 entered the return procedure. In order to enable the spacecraft to aim at the landing area more accurately, after the technicians measured the orbital position and altitude of the spacecraft in real time, Shenzhou 12 still needs to fly around the earth more than ten times, each circle for about 1.5 hours, and then gradually reduce the orbit. Before entering the atmosphere, the spacecraft should complete the separation of the propulsion module. Shenzhou 12 manned spacecraft return module successfully landed at Dongfeng landing site source: China Manned Spaceflight wechat company Rapid return is similar to rapid docking. After the manned spacecraft leaves the space station cabin, it directly enters the return mode. The whole process takes only a few hours. The Chinese space station will enter the construction stage After Shenzhou 13 returns, the space station will usher in a major transformation. After the Shenzhou 13 astronaut crew stays in orbit for 6 months and returns to the ground, the scientific researchers will conduct a comprehensive evaluation on the verification of key technologies of the space station. After the results meet the requirements, the space station will be transferred to the construction stage. After the completion of the construction of the Chinese space station, the astronauts will continue to stay and the practical (Trial) inspection of multi field space science and technology. The space for activities in the cabin will exceed 110 cubic meters, providing six sleeping areas and two health areas, which can realize the long-term presence of three people and short-term presence of six people. It is understood that two space station experimental modules, two manned spacecraft and two cargo spacecraft will be launched this year, and six astronauts will be sent to the Chinese space station. The six astronauts in the Shenzhou 14 and Shenzhou 15 crew will "meet" in space and work together in orbit for about a week. At present, the astronauts and crew carrying out two manned missions in the construction phase of the space station have been selected and are carrying out mission training. (Xinhua News Agency)