" Tiangong Classroom " What does the new classroom look like?
What kind of magical artifact is there for "space hotel" for animals and plants?
卡方1卡方法 . Is rice adapted to space life?
On October 12th, the third lesson of "Tiangong Classroom" began as scheduled. "Space Business Trio" Chen Dong , Liu Yang , Cai Xuzhe teaches teenagers in the space station in the space inquiry experiment cabin of the China Space Station. The teaching is conducted in a dialogue between heaven and earth. In addition to the ground main classroom in Beijing, ground sub-classrooms are also set up in Zhengzhou, Henan, Heze, Shandong, and Dali, Yunnan.
new classroom has many artifacts, life and scientific experiments are both good and good
This time, astronauts used the new classroom - the Wentian Experimental Cabin.
What does the new classroom look like? Chen Dong and Liu Yang took everyone to explore the secrets first. The Wentian Experimental Cabin not only has life functions, but also scientific experiment functions.
Question Day Experimental Cabin is the first complete experimental cabin section of space station , with a complete environmental control and life insurance system and basic living facilities.
sleep area provides guarantees for future group rotations. The direction of the sleeping area of the Wentian Experimental Cabin is different from that of the core cabin. The core cabin is horizontal, while the Wentian Experimental Cabin is vertical. Liu Yang said: "In the microgravity environment, the feeling of sleep is the same in any direction, so the direction of the sleep area is arranged according to the design needs."
flying forward is the living area of the Wentian Experimental Cabin, which has space kitchen equipment, "gym", bathroom, etc. The configuration of the space kitchen is basically the same as that of the core cabin, while the "gym" houses space bicycles transferred from the core cabin.
Liu Yang said that the Wentian Experimental Cabin has the ability to independently support the life support of astronauts and crews in orbit and has a complete control system. If the core cabin encounters an emergency, the Wentian Experimental Cabin can take over control as the core of the entire space station. In terms of scientific experiment functions, the Wentian Experimental Cabin contains scientific glove boxes, low-temperature storage cabinets, life ecology experiment cabinets, radiation metering devices, biotechnology experiment cabinets, variable gravity experiment cabinets and other scientific experimental tools. The scientific glove box provides a closed and clean operating space. In the future, a clever robotic arm and microscopic operating system will be installed. With their cooperation, cells can be performed on surgery and punctured, and the operating accuracy can reach 5 microns. The low-temperature storage cabinet is equivalent to a space refrigerator for experimental samples, and can provide storage temperatures of minus 80℃, minus 20℃, and minus 4℃ to meet the needs of different samples for low temperatures. The biotechnology experimental cabinet is mainly a scientific research equipment for research on biological samples such as cell tissue , protein , etc. It is equipped with various advanced cell culture and detection instruments, which is equivalent to a small space biological laboratory.
variable gravity experimental cabinet can conduct high-precision simulation of gravity environment. Using this experimental cabinet, a number of scientific experiments including life, fluid, combustion, etc. can be carried out.
"Space Hotel" to explore animals and plants. Chen Dong wears MR glasses to sample plants
In the classroom, we saw space lettuce, space wheat, space rice, space Arabidopsis in the space station...
these plants are all cultivated in the life ecological experimental cabinet. "The life ecology experimental cabinet is an experimental platform with biological individuals as the research object. The experimental cabinet is composed of modules like small rooms. Each room corresponds to different research objects, just like a 'space hotel' for animals and plants." Liu Yang told the students that the research results of this experimental cabinet can help us achieve long-term life on the moon and even Mars in the future.
In September this year, astronauts and students in the ground classroom watered and sowed Arabidopsis thaliana . In this class, astronauts demonstrated scientific experimental operations in a scientific glove box for the first time - collecting Arabidopsis samples.
Before the experiment, Chen Dong first wore the first mixed reality (MR) glasses of my country's space station. Through glasses, the picture in the science glove box is presented on the live broadcast screen."Open and take photos" and "send pictures"... Through the voice command, Chen Dong first took photos of Arabidopsis in the planting hole and sent the pictures to scientists on the ground. Then he picked up scissors, carefully cut off the Arabidopsis sample and put it in the frozen storage duct. "After taking out all the frozen storage tubes, I will put them in the minus 80 degree storage area below, and take them back to the earth and hand them over to scientists for research when they return to the ground," said Chen Dong.
Currently, in the life ecological experiment cabinet, in addition to Arabidopsis, another plant - rice has been cultivated. After more than 70 days of growth, the rice seeds have grown into rice plants. Liu Yang introduced that the important goal of this experiment is to achieve the cultivation of rice from seed to seeds throughout the life cycle. "During the rice cultivation process, we discovered a strange phenomenon. On the tip of the newly germinated rice leaves, a small crystal water droplet appeared, and the small water droplets became larger and larger until they were attached to the wall of the growth box. This is the 'spit' phenomenon of rice."
"Cultivate in space, can plants receive sufficient light?" The students in the Henan Ground Classroom raised such questions during the interaction between heaven and earth.
Liu Yang told the students that the plants in the experimental cabinet cannot accept sunlight, but the artificial light source inside can provide recombinant light to the plants by regulating the intensity and spectrum of the light source to meet the needs of growth and development. At the same time, scientists can also design corresponding lighting conditions according to the different requirements for light growth of different plants.
"Although we cannot directly utilize natural light at present, with the advancement of technology, perhaps in the future, we can directly use natural light to cultivate plants." Liu Yang encouraged the students to study hard and think diligently, "Maybe this problem is solved by you."
super nice! In the microgravity environment, astronauts are lying in the air to drink water
in China Space Station . Affected by the gravity gradient and disturbances in the operation of large devices, this is not zero gravity, but microgravity.
What magical phenomena will happen in microgravity environment? In the "Tiangong Classroom", Chen Dong and Liu Yang conducted experiments such as capillary phenomenon, water polo becoming "lazy", wrench flip, and drinking water for a two-meter-long tube.
When the water ball becomes "lazy", Liu Yang added a small steel ball to the water ball. A magical scene happened: the originally swaying water ball became "lazy". In the
wrench flip experiment, Chen Dong showed different flip methods, and the wrench flip looked different.
What netizens envied the most is the drinking process. "On the ground, we usually use shorter drinking water pipes. If the drinking water pipe is too long, it will be more laborious. Today I am preparing a two-meter-long drinking water pipe to see if I can drink it?" After saying that, Liu Yang "flying around the eaves and walls", lying horizontally, using a two-meter-long tube, and easily drank mango juice. She said: "Due to the effect of gravity on the ground, the higher the liquid tube when drinking water with a drinking water pipe, the more effort it is, the higher the liquid tube. However, the space station is microgravity. Relying on the force of sucking, you can drink the drink in the drinking water bag two meters away."
Before the live broadcast, astronaut Ye Guangfu revealed that in the Chinese space station, sitting, standing, lying... you can drink whatever you want. Water comes from the purification of sweat and urine, and is self-produced and sold. Ye Guangfu said: "These waters are all scientifically rigorously processed, and are even cleaner than pure water."
The starry sky is vast and
Exploration is endless
Text | Modern Express + Reporter Chu Xihao Hu Yumei
Video | Modern Express + Reporter Su Rui Liu Xiaoqi Li Yiheng
