The astronauts of Shenzhou XIII began to pack their bags and prepare to go home.

The astronauts of Shenzhou XIII began to pack their bags and prepare to go home.

The astronauts of Shenzhou XIII began to pack their bags and prepare to go home. As the Shenzhou 13 astronauts entered the countdown stage, the Dongfeng landing site also launched a search and rescue drill, which is expected to return to the ground in April. Shenzhou 13 astronauts began to pack and prepare to go home.

Astronauts of Shenzhou XIII begin to pack and go home 1 Three astronauts of Shenzhou XIII have been working and living in the space station for more than five months. According to the plan, they will work and live in orbit for about 180 days, and now they have entered the countdown to "going home".

According to CCTV news reports, at present, the trio on a business trip in space began to pack their bags, strengthen their physical fitness and prepare to go home. Many netizens saw this scene and expressed their welcome to go home, paying tribute to the space hero, expecting the hero to return triumphantly, smoothly and safely!

According to China News Network, at the press conference of "Blue Book of China Aerospace Science and Technology Activities (202 1)" on February 9, it was officially introduced that the Shenzhou-13 manned spacecraft was scheduled to perform the return mission in mid-April, and the quick return scheme would be adopted for the first time.

At 0: 23 Beijing time (202 1, 16), the Long March II F-13 carrier rocket carrying the Shenzhou XIII manned spacecraft was ignited and launched at Jiuquan Satellite Launch Center. The Shenzhou XIII manned spacecraft was successfully separated from the rocket and entered the scheduled orbit, and three astronauts, Zhai Zhigang, Wang Yaping and Ye Guangfu, were successfully sent into space. The pilot was in good condition and the launch was a complete success.

This is the second1mission since the implementation of China's manned spaceflight project, and it is also the second manned mission in the construction stage of the space station.

Shenzhou 13 astronauts began to pack and prepare to go home. 2 Dongfeng landing field drill takes astronauts home! Shenzhou 13 astronauts went home to enter the "countdown". Meanwhile, according to the news released by China Manned Space Engineering Office, the astronauts of China Shenzhou XIV and Shenzhou XV have been confirmed. Therefore, China's Shenzhou 13 astronauts will return to China, and Shenzhou 14 and Shenzhou 15 manned spacecraft will also be launched one after another.

Then after many people saw the news, the problem came. Why is it at the easterly landing site this time? Isn't Siziwangqi Landing Site a famous landing site in the history of China? The astronauts of Shenzhou 14 and Shenzhou 15 have confirmed whether they will welcome foreign astronauts for the first time. Let's look at it step by step.

Dongfeng took the landing field exercise and took the astronauts home.

As the Shenzhou-13 astronauts entered the countdown stage, the search and rescue drill at the Dongfeng landing site also triggered a heated discussion among many people. According to the plan of China Space Station, it is expected to return to the ground in April.

By then, Shenzhou XIII astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu will all return to Earth in the return capsule. They also lived and worked in orbit for about 180 days as planned to prepare for the further construction of China's space station.

What did the Shenzhou XIII astronauts do? On the basis of Shenzhou XII, Shenzhou XIII completed more than 20 scientific experiments, which can be said to be excellent.

On the one hand, these experiments focus on the new technology of astronaut health monitoring, on the other hand, they focus on new scientific knowledge and discoveries, and on data accumulation, and they have completed a series of innovative studies. This is of great significance to the future research of China Space Station.

Especially in life science research, it has achieved very good results. That is, in the weightless environment of the space station, during the orbit of Shenzhou XIII, a long-term cell culture system and cell model under space conditions were established for the first time. Using this system and cell model, researchers have completed several international leading life science experiments.

It is the first time to observe the "calcium signal flicker" of myocardial cells under weightlessness, so this achievement has also set a "historic" scene. What we have introduced is only a part. The first weightless suspension culture experiment of skin stem cells in the world has been completed, and so on.

We were very excited when the astronauts came home from the Dongfeng landing site exercise, and the search and rescue equipment newly equipped by the air and ground teams participated in the whole process. This means that we will see the "space hero" on the ground faster and wish the hero a triumph. You have really worked hard, and you have created a historic scene for China's space industry. Moreover, in the weightless environment in space, what the body bears may not be experienced by ordinary people.

For example, people say that astronauts are getting fat, but in fact they are not getting fat, but because of the phenomenon of puffiness in space. After weightlessness, body fluids need to be redistributed and distributed more to the head, so astronauts will look fatter.

In addition, because people's muscles also have weight, they are subjected to downward force when they are on the ground. In space, because muscles lose their gravitational traction, there will be a "skin lift" effect. This kind of tolerance is not something that ordinary people can do, so life in space is not as easy as everyone thinks.

Shenzhou 13 astronauts are preparing to return, why choose Dongfeng landing site?

Undeniably, Siziwangqi Landing Site has been the main utilization area in China before, but our newly utilized Dongfeng Landing Site has more obvious advantages than Siziwangqi Landing Site. The Dongfeng Landing Site covers an area of about 20,000 square kilometers, with an average length of120km from east to west and190km from north to south.

This area is located in the Gobi area of Badain Jaran Desert, with vast territory and sparsely populated, which is a very good area. Here are some details.

First, it is a very good choice for search and rescue forces. Dongfeng Landing Site is built on the basis of Jiuquan Satellite Launch Center, which can be carried out in all mission sections of launch, operation and return, and can quickly realize diversified search and rescue missions.

Second, the Dongfeng landing site has low maintenance costs and strong search and rescue capabilities. When the astronauts return, we can rely on the human resources of Jiuquan Satellite Launch Center and facilities and equipment such as measurement and control, communication, meteorology, medical care, transportation and logistics support, and use limited professional search and rescue forces to quickly find the astronauts who returned to the ground and provide help.

Thirdly, the geographical conditions of Dongfeng landing site are very good. As mentioned above, it is located in the Gobi Desert, with few people, few grasslands and less cultivated land. For such geological conditions, there is no large-scale economic construction plan for the time being. The landing site will not only affect the original local economic construction, but also promote the local economic development by developing space tourism.

These are three basic reasons, so there is no problem in choosing the easterly landing site. Moreover, the Shenzhou-12 astronauts also landed in the Dongfeng landing field of Jiuquan Satellite Launch Center, and accumulated a lot of experience. The return of Shenzhou XIII astronauts may be faster, which is the general situation.

Shenzhou 14 astronauts confirmed that there are French, German and Italian astronauts?

Indeed, after the return of the Shenzhou-13 astronauts, we will probably carry out the Shenzhou-14 mission soon. Many people are asking whether foreigners will enter the China Space Station. When carrying out the Shenzhou 12 mission. China also announced a message again.

That is, as early as 20 15, the European Space Agency reached a cooperation agreement with the China National Space Administration to send astronauts for joint training.

Three astronauts from France, Germany and Italy are taking the time to learn Chinese. Have you seen them? Astronauts from France, Germany and Italy have learned Chinese, and it is expected that they will go to Tiangong Space Station by spaceship as early as 2022.

So, it's 2022. Will you study hard and get into China Space Station? In addition, Shenzhou XIV was the first manned spacecraft mission of China to launch a space station in 2022.

However, according to the news released by the China Manned Space Engineering Office, although it has been explained that the astronauts of Shenzhou 14 and Shenzhou 15 have been confirmed and are being trained. However, the detailed list of personnel has not been announced.

Therefore, no one knows whether there are French, German and Italian astronauts. It will only be clear after the subsequent announcement. This is the general situation.

The astronauts of Shenzhou XIII began to pack their bags and prepare to go home. It has been more than five months since three astronauts went to Tiangong Space Station last year, which is very close to the original planned service time 180 days. So, this means that the "Space Station Trio" will return to Earth soon.

Starting from this week, three astronauts will begin to enter the preparation stage for their return. Since it is "going home", it is inevitable to bring things, but what will be brought back is different from what ordinary people bring on business trips. So what luggage will astronauts bring when they return to Earth from the Tiangong Space Station?

We ordinary people come back from business trips with nothing more than food, clothing, housing and transportation, while space business trips are different. The space package is "all-encompassing" and the "seed" is the most important part.

These seeds are unusual. They were taken to heaven. They flew in the sky with astronauts for half a year, and now they have brought them back. After being improved and cultivated by scientists, it is planted. This is the technology of "space breeding" that we usually hear.

"Space breeding" is also called "space mutation breeding". The space station has a microgravity environment, plus the "alternating magnetic field" and "high vacuum and strong radiation" that are common in space. In this environment, the DNA of common seeds will easily break and then heal.

Scientists use this "healing" process for space breeding. Different from our conventional understanding of healing, the healing after DNA breakage does not start from the broken place, but gene dislocation such as "inversion and repetition" will occur.

Genes directly determine the traits of species to a great extent, so the gene mutation caused by this "dislocation" has produced countless possibilities for seeds.

Some plant characteristics beneficial to human beings may be strengthened, such as drought tolerance, and plants will become more likely to grow in arid areas. And some plant characteristics that are useless to human beings may also be weakened. For example, rice grows too high and is easily blown down by the wind.

So far, we have sent more than 4000 kinds of plant seeds or seedlings into space. After selecting the best from the best, more than 200 kinds have been allowed to be popularized and used.

Why don't most seeds or seedlings be popularized? Because most of these seeds don't produce obvious variation or unfavorable variation, only a few actually produce variation that can benefit human beings. Even if it is favorable variation, scientists should conduct strict selection tests to avoid potential harm to human beings.

Give a famous example of "space breeding": space bananas. Compared with common bananas, space bananas have higher yield and shorter growth cycle. Besides, this is not the best. Worst of all, the drought tolerance of space bananas has been greatly enhanced, which means that banana cultivation is no longer limited to tropical areas like Hainan. Now, we have been able to grow bananas in the cold northeast of Dalian, which is simply a miracle.

In addition to space bananas, there are also space Phalaenopsis, which are more colorful and more beautiful. And space Arundo donax. Compared with common Arundo donax, Arundo donax has deeper roots, more lodging resistance and salt tolerance. It can survive in poor soil, grow taller, and can resist wind and protect dikes. Moreover, the leaves and stems of space Arundo donax can also extract alcohol, which is a good renewable industrial raw material.

Some people will say that everything has advantages and disadvantages. These seeds are so powerful when walking in the sky with astronauts. Will it cause harm to the human body?

Obviously, this kind of worry is unnecessary. The genetic mutations of these seeds are all "self-gene" rearrangements, which do not involve gene editing or gene hybridization of other species. This reordering of "self-genes" can be understood as artificially accelerating the process of natural selection, and we just chose excellent traits.

If humans don't speed up this process, in the long process of natural selection, plants with excellent characters will actually appear, but it will take a long time, so this is an inevitable species and will not cause any harm.

With the advancement of space projects such as "Yuegong-1", scientists in the future will not only conduct space breeding in the plant dimension, but also raise fish in space and conduct space breeding in the animal dimension.

Perhaps, in the future, the content of "Tiangong Classroom" will be more abundant, and Tiangong Farm and Tiangong Ranch may be part of it. So let's look forward to it together.

Astronauts will return in April, and they will bring back precious gifts for us. Let's wish them a safe landing and a successful return.