What preparations do the three astronauts need to make for the upcoming return of Shenzhou 13?Lesson learned should not be forgotten

2022-08-03 0 By

More than five months have passed since the successful launch of the Shenzhou-13 spacecraft, which sent astronauts on a business trip into space, and the countdown to their return home has begun.So, shenzhou 13 return is imminent, 3 astronauts need to do what to prepare?Many people may not know that space business trip is not as easy as we imagine. In addition to the huge difficulties to get into space and return to Earth, the special space environment during space business trip is also a great test to the physical and psychological quality of astronauts.Not to forget, some preparations are absolutely necessary for the three astronauts, because it is directly related to their safe return.On October 16, 2003, Yang Liwei returned to earth in the Shenzhou V re-entry capsule. Although he landed successfully, he encountered great difficulties during his return journey.After the re-entry capsule entered the atmosphere, under the air resistance in the dense atmosphere about 100 kilometers from the ground, the speed of the re-entry capsule sharply decreased, and the overload of the re-entry capsule once increased to about 4G, which is equivalent to 4 times the weight of the human body!Yang Liwei, the astronaut in the capsule, was under unimaginable pressure, his chest and back tightly pressed, despite the higher intensity of his training.To paraphrase a line he wrote in A Day in Space: “My whole body strained, my muscles tensed, my whole body contracted like iron.”That’s not all, of course.After rushing out of the dense atmosphere, the parachute of the re-entry capsule was damaged, which directly led to the failure of the re-entry capsule to decelerate to the ideal state within the predetermined time. Due to the fast landing speed, the re-entry capsule was directly bounced from the ground at the moment of landing until it landed again.When the capsule collided with the ground, Yang liwei, who was inside the capsule, was thrown around by the force of the impact and his lip was cut by the edges of the microphone.If you take a closer look at the photo of Yang Liwei leaving the capsule, you will find that there is obviously a blood stain on the corner of Yang Liwei’s mouth, which is the blood stain from the microphone cutting his lip…As the first Chinese astronaut to go into space, Yang Liwei’s experience in space should be learned by all astronauts.To prevent such incidents from happening again, researchers have not only upgraded the capsule’s technology, but also modified the microphones worn on the astronauts’ heads. The microphones are now smaller and covered with a sponge to prevent them from accidentally hitting the astronauts.For the astronauts, it is to pay more attention to their physical and psychological quality training, because no one can ensure that the astronauts in the complex space environment, what kind of danger will encounter, only have strong enough physical and psychological quality, so that the astronauts in the face of danger, fearless.It is worth mentioning that Yang Liwei only stayed in space for one day, while the three astronauts on the Shenzhou 13 mission stayed in space for more than five months.That’s a long, long time, but it’s enough to have an impact on the astronauts’ bodies.In microgravity environment for a long time, the astronauts’ muscle tissue is in a state of relaxation, such as this will cause their muscle atrophy, meanwhile blood, body fluids, circulation will also be affected by microgravity environment, not only can reduce the body fluids, and even may cause disorder of immune system, these are the astronauts need to consider before returning to earth.To cope, the three astronauts have begun intensive training aimed at making them physically stronger for the difficulties they will face on their return to Earth.After all, the danger Yang faced at the time was deeply engraved in their minds, and no one was sure that the same danger would happen again.Strong physical and psychological quality, is the key to deal with all dangers.In addition, the three astronauts on Shenzhou 13 will face two other “different” challenges compared to Yang’s initial difficulties.The first is familiarity with the operating system and return flow.Because they are on mission during their stay in space for more than five months, they will not be able to review the operating system and return process very often. Therefore, they will have to reinforce these contents before returning to Earth in case of unexpected problems caused by unfamiliar conditions.Then it is to sort out materials, test samples, clean up the living garbage.Tianzhou 3 cargo spacecraft was launched recently, delivering more than 200 packages to the space station, nearly 6 tons of supplies, including food, water, oxygen supplies and various consumable supplies, which need to be sorted out patiently by the three astronauts, otherwise it will bring a lot of inconvenience to the subsequent astronauts to enter the space station.Test samples and household garbage also need to be sorted out and brought back by astronauts.Needless to say, experiments are part of the crew’s multi-tasking mission.It is worth mentioning that all kinds of household garbage, for a period of more than five months of space life, the astronauts made a lot of household garbage, before returning to the earth they need to do a thorough “cleaning”, all these household garbage concentrated on the Tianzhou 3 cargo spacecraft.After their successful return to Earth, the tianzhou 3 cargo spacecraft carrying the household waste will crash into the Earth’s atmosphere, where it will burn up under the force of friction.Conclusion So, although the space mission is nearing its end and the astronauts are coming back to Earth, they will still be very busy and very full these days.All this preparation is for a smooth and safe return to Earth.Finally, let’s hope for the safe return of the three astronauts…