According to the plan, after the Shenzhou-12 spacecraft is in orbit, it will dock with the front port of Tianhe core cabin by autonomous rapid rendezvous and docking, and form an assembly with the Tianhe core cabin Tianzhou-2 cargo spacecraft. Astronauts enter the core cabin, carry out a synchronized work and rest system between heaven and earth, stay for about 3 months, and return to the Dongfeng landing site in the spacecraft return cabin.
Shenzhou 12 manned mission is the fourth mission in the key technology verification stage of China Space Station, and it is also the first manned mission in the space station stage. This mission will verify the key technologies of the construction and operation of the space station, such as astronauts' long-term stay, regeneration and life support, space material replenishment, extravehicular activities, extravehicular operations and on-orbit maintenance, and test the astronauts' search and rescue capabilities at the Dongfeng landing site for the first time; Carry out multi-field space applications and experiments; Comprehensively evaluate and assess the functions and performance of each system in the project to perform the space station task, further assess the matching and coordination among the systems, and accumulate experience for the follow-up tasks.
Don't think that the launch of Shenzhou XII has nothing to do with us farmers, but it has a lot to do with it! As many people know, every time we launch the shenzhou spaceship, we will definitely bring some seeds? For example, Shenzhou 5 brought 1 kg of plant seeds; Shenzhou VI brought the seeds of Begonia, Gesneriaceae and Erigeron breviscapus. Shenzhou VII brought 87 varieties of vegetable seeds; Shenzhou VIII brought seeds such as yew and olive; Shenzhou 9 brought Yunnan Pu 'er tea seeds; Shenzhou 10 brought ginseng seeds; With good varieties, we can better benefit mankind! Don't think that bringing seeds to the spacecraft is just a simple handling, but a series of complicated screening and cultivation.
First of all, in seed selection, varieties with good genetic stability, strong disease resistance and high yield are required to qualify for space. The reason why the seed was taken into space was to change its genes. However, the space environment is harsh, and ultraviolet rays and solar wind will destroy its genetic material with high probability, leading to genetic variation of seeds. On the earth, because of the existence of geomagnetic field and ozone layer, the probability of genetic mutation in organisms is only one in 200,000, but in space, it is a few percent and a few thousandths. Although space seeds are not 100% gene mutation, when they return to the earth, no one knows which one has gene mutation. At this time, breeders need to cultivate them and select some seeds with genetic mutations. These good seeds will benefit all mankind!
Jiangsu Rongcheng agriculture waits for the hero to triumph after 3 months!