1:01 at 16:01 on October 12, the third lesson of " Tiangong Classroom " was held in China Space Station . The new "space teacher" Chen Dong , Liu Yang , Cai Xuzhe brings a wonderful space science popularization class to young people.
This is the first time that Chinese astronaut has taught in the Wentian Experimental Cabin.
During the course of about 50 minutes, astronauts of Shenzhou 14 flight crew, Chen Dong, Liu Yang and Cai Xuzhe, vividly introduced and displayed the working and life scenes of the space station question-and-day experimental cabin, demonstrated the capillary effect experiment in the microgravity environment, the experiment of "lazy" water balloon, interesting drinking water in space, and the wrench that can turn heads, and vividly explained the scientific principles behind the experiment. In addition, the astronauts also focused on the research on rice and Arabidopsis thaliana planting carried out on the Chinese space station, and demonstrated the scientific glove box plant shearing operation. During the teaching of
, astronauts interacted with teachers and students in the ground classroom through video calls, and ground classroom experts also carefully analyzed relevant scientific issues.
This event has set up a ground main classroom in , the Center for Space Application Engineering and Technology of the Chinese Academy of Sciences, and 3 ground sub-classrooms in Heze, Shandong, Zhengzhou, Henan, and Dali, Yunnan. About 400 representatives of primary and secondary school students participated in the on-site event.
teaching activity is co-organized by China Manned Space Engineering Office , together with the Ministry of Education, the Ministry of Science and Technology, China Association for Science and Technology, and Beijing Space Flight Control Center , China Astronaut Research and Training Center , China Academy of Sciences Research and Training Center , China Academy of Sciences Space Application Engineering and Technology Center, China Space Technology Research Institute and other manned space engineering participation units. During the construction and operation of the
space station, "Tiangong Classroom" will continue to carry out space teaching activities to carry out aerospace science popularization education with diverse forms and rich content. The China Manned Space Engineering Office will continue to solicit creative suggestions on "Tiangong Classroom" through media, "Study Strong Country" and the official website of manned space engineering, and welcome all sectors of society, especially young people, to participate actively.
Class Review
The thicker the water pipe, the slower the liquid rises?
Astronauts Chen Dong and Liu Yang demonstrated significant capillary phenomenon in liquids in weightless environments.
can be seen in the experiment that the liquid level of the thinnest tube rises very quickly, while the liquid level of the two tubes next to it rises slowly. The most obvious difference from the ground is that due to the absence of gravity in space, the surface tension of will be more obvious, which will drive the liquid level to continue to rise, and eventually the liquid level will rise to the top of the tube.
When the water ball goes into space, becomes "lazy"?
Astronaut Liu Yang successfully demonstrated the process of purple water ball from "active" to "lazy" in the experiment of water ball becoming "lazy".
It turns out that when external force is applied to the water ball, the water will resonate. After adding an steel ball , the natural frequency of the water ball will change, which is relatively difficult to cause resonance . Zhang Lu, deputy director of the Integrated Technology Center of the Space Application Center of the Chinese Academy of Sciences, said that putting a ball in the water on the ground will also slow down the water vibration. When carrying water, putting a lotus leaf on the surface of the bucket is also the same principle.
can a straw with a two-meter length drink water?
What is the difference between drinking water in a space station and drinking water on the ground in a microgravity environment? Astronaut Liu Yang demonstrated the interesting phenomenon of drinking water with a super long straw.
Liu Yang took out a 2-meter-long tube and put one end of the tube into mango juice. Liu Yang took a sip and the mango juice was injected into her mouth with the tube.
Due to gravity, when using the drinking water pipe to drink water, the higher the liquid pipe, the more effort it will be to suck. However, the space station is in a microgravity environment, and you can drink the drink in the drinking water bag 2 meters away by relying solely on the power of sucking.
Will the wrench turn around in microgravity environment? During the
space teaching , astronauts demonstrated the phenomenon of the wrench rotating and flipping in microgravity environment.
T-shaped wrench, rotates left and right, the wrench is not easy to turn around, and the wrench is easy to turn around by rotating up and down. Why is this?
"The Wrench Who Turns" shows the "Janibekov Effect", which was originally discovered by Soviet astronaut Janibekov in a space station, and the rotation method of steel is related to the distribution mass. Specifically, rigid body is stable when it rotates around its spindle with the largest moment of inertia or the spindle with the smallest moment of inertia, but is unstable when it rotates around the intermediate axis.
Visit the classroom
Detailed explanation of the 4 experimental cabinets of the Wentian Experimental Cabin
This is the first time that a Chinese astronaut teaches in the Wentian Experimental Cabin. What are the functions of the new experimental cabinets?
■Scientific glove box and low-temperature storage cabinet
Questioning Experimental Cabin brings more new scientific experiment cabinets. The scientific glove box provides astronauts with a closed and clean operating space, making astronauts' experiments more convenient and controllable. In the future, astronauts will also install a clever robotic arm and a set of microscopic operating systems here. With their joint cooperation, cells can be performed on surgery and punctured, and its operating accuracy can reach 5 microns.
low-temperature storage device is equivalent to a space refrigerator for experimental samples. It can provide storage temperatures of minus 80℃, minus 20℃ and 4℃ to meet the storage needs of different samples for low-temperature storage.
■Life Ecology Experiment Cabinet
Life Ecology Experiment Cabinet is an experimental platform with biological individuals as research objects. 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. The research results of this experimental cabinet can help us achieve long-term life in the future on the moon and even Mars .
radiation metering device can measure the radiation level in the cabin and help us better monitor the environment in the cabin.
■Biotechnology Experiment Cabinet
Biotechnology Experiment 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 experiment cabinet
Variable gravity experiment cabinet can provide high-precision simulated gravity environment for scientific experiments.
has two disks in the experimental cabinet called rotors. Each rotor is loaded with standard experimental modules, which can be used alone or in combination. The principle is to use centrifugal action. At present, we can provide a long-term stable gravity range of 0 to 2 times, and simulate the gravity environment with high accuracy. Using this experimental cabinet, we can carry out a number of scientific experiments including life, fluid, combustion, etc.
Answers and answers questions
Why should we move the laboratory to space?
Space has many special environmental conditions different from the ground, such as microgravity, strong radiation, high vacuum, etc., among which the most significant is the microgravity environment. The microgravity experimental environment created on the ground can only last for a few seconds at a time, and the nearly infinite microgravity scientific research conditions provided by the space station's long-term space flight can obtain experimental results that cannot be obtained on the ground.
Expert reveals how to prepare lessons for
"Tiangong Classroom"? What is the priority for course design?
"Tiangong Classroom" has successfully held two space lectures before. How does "Tiangong Classroom" prepare lessons? What kind of experimental project can be selected... How to prepare lessons for "Tiangong Classroom" in
?
"Tiangong Classroom" teaching expert group member Beijing Jiaotong University Associate Professor Chen Zheng said: "Experts from multiple fields participated in the preparation of "Tiangong Classroom", including experts in aerospace systems, college teachers and scientific researchers, primary and secondary school teachers, etc. Before the "Tiangong Classroom" starts, astronauts need to repeatedly test to ensure the experimental results. They feed the test results to the expert group on the ground to repeatedly confirm and communicate the content. The teaching content everyone saw was only a few dozen minutes, but in fact the preparation process was very long."
What is the difference between this class and the past?
The "Tiangong Classroom" of China Space Station is very different from the past. Not only is the "speaker" the first time the Shen 14 astronaut crew was appointed, but the teaching environment has also changed greatly.The "lecture hall" of
"Tiangong Classroom" has added a new "Tiantian Experimental Cabin based on the previous Tianhe core cabin, so that the "space teacher"'s activities have a larger scope, and correspondingly, more camera positions and support equipment are used in the live broadcast, and the operations of ground scheduling are more complicated.
Beijing Space Flight Control Center Communications Scheduler Yuan Xudong said: "We adopted the switching tracking mode of the two-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-cabin inter-ca
Yuan Xudong said: "One sky chain relay satellite tracks the Wentian experimental cabin, and the other relay satellite tracks the Tian and core cabin. The two tracking arc segments are overlapping. First, the Wentian experimental cabin sends the image voice down, and then in the overlapping arc segment of the two stars in the middle, we select the opportunity to switch the image voice. In order to ensure that the image voice returned to the ground is stable and smooth, scientific and technological personnel have also formulated a careful plan." What kind of experimental project can be selected for
? Shi Yusheng, an astronaut training instructor at the China Astronaut Research and Training Center, said: "When we choose experimental projects, we mainly have the following considerations: first, the differences in phenomena in the world must be significant, the second is that the scientific principles must be clear, and the third is that the overall visual effect must be good, the communication is compatible, and it can play a real popular science effect." What are the requirements for the design of
courses? Since the launch of
"Tiangong Classroom", three space lectures have been successfully held. So, what are the requirements for the design of different courses in several space courses? Chen Zheng, an associate professor at Beijing Jiaotong University, a member of the "Tiangong Classroom" teaching expert group, introduced that the first lesson of "Tiangong Classroom" is mainly aimed at primary school students and focuses on fun. The second lesson of "Tiangong Classroom" is mainly aimed at junior high school students, radiating down to primary school students, and up to high school students and enthusiasts in the whole society. The content about space science experiments has been increased. While maintaining interest, everyone can understand what scientists do on it and what scientific experiments do. The third lesson of "Tiangong Classroom" is more in-depth and three-dimensional, and has stronger participation.
Shaanxi Power
The Xi'an Branch of the Fifth Academy of Space Fifth Academy to build the "Space and Space Road"
" Space Classroom " is to ensure smooth communication links. The space station question-of-the-sky experimental cabin relay terminal carefully created by researchers from the Xi'an Branch of the Fifth Academy of Aerospace Science and Technology Group Corporation establishes communication contact with the ground through relay satellites, and builds a "space road", thus realizing real-time teaching by astronauts. After the space-based measurement and control communication system established by
through relay terminal is completed, the measurement and control coverage rate of the ground-based test cabin and space station will be increased to more than 90%, ensuring that the Integrated test cabin maintains real-time communication with the ground for most of the time. Yu Xiaochuan, the head of the manned aerospace engineering mission of the Xi'an Branch, introduced that the original ground measurement and control stations and maritime measurement and control stations of the manned aerospace engineering have a small measurement and control coverage rate, but now it has achieved almost 100% measurement and control coverage rate, ensuring that real-time teaching of astronauts and the ground is unimpeded. During this activity, the relay terminal ensures that the signal transmission continues to be normal through handover tracking between Tianlian relay satellites. China Business News reporter Ma Huzhen
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