China astronauts invited young friends to do experiments at the same time.
? Tiangong classroom? What are the specific courses in Lesson Three?
This space teaching activity will continue to be conducted in an interactive way between heaven and earth. Three astronauts will introduce and show the working and living scenes of the experimental cabin of China Space Station in orbit, and demonstrate the capillary effect experiment and water polo changes in microgravity environment. Lazy? Experiments, interesting drinking water in space, turnable wrenches, plant growth research projects, etc., and interact with ground classes to spread manned space knowledge and stimulate young people's interest in science.
? Tiangong classroom? Since its launch, two space lectures have been successfully held, which has achieved good social response. In the early stage of teaching content collection activities, all walks of life, especially the vast number of teenagers, through the news media, Learn to be a strong country? Official website enthusiastically contributed to the platform and manned spaceflight project, and many good creative designs stood out, which will be displayed in this lecture and follow-up activities.
China astronauts sincerely invite young people to try to carry out related experiments synchronously on the ground, to perceive the mystery of the universe from the difference between heaven and earth, and to experience the fun of exploration.
? Tiangong classroom? How to prepare lessons?
? Tiangong classroom? The third class will officially start in the afternoon of 12, then? Tiangong classroom? How to prepare lessons?
? Tiangong classroom? Chen Zheng, associate professor of Beijing Jiaotong University, member of teaching expert group: experts from many fields participate? Tiangong classroom? Prepare lessons, including experts in aerospace systems, teachers and researchers in colleges and universities, teachers in primary and secondary schools, etc. ? Tiangong classroom? Before the class begins, astronauts need to test repeatedly to ensure the experimental effect. They fed back the test results to the expert group on the ground, and repeatedly confirmed and communicated the contents. What you saw in the lecture was only a few minutes, but in fact the preparation process was very long.
Is this a two-cabin relay? Tiangong classroom? Very different from the past.
This Chinese space station? Tiangong classroom? Very different from the past, not just? The lecturer? For the first time, great changes have taken place in the teaching environment. What is the difference?
? Tiangong classroom? what's up Lecture hall? On the basis of the previous space and core module, the candlestick experiment module is added, so? Space teacher? The range of activities is larger, the camera positions and supporting equipment used in live broadcast are more, and the operation of ground scheduling is more complicated.
Xu Dong, Communication Dispatcher of Beijing Aerospace Control Center: We have adopted the mode of switching tracking between the space module and the space module, and each module can download the same camera (image), including voice. Through the voice cascade and image download of the two cabins, the whole (space teaching) image voice is guaranteed to be smooth. In the process of the relay between the two cabins, in order to ensure the teaching effect, we also carefully designed and combined with the teaching script to switch between images and voices.
? Tiangong classroom? The live broadcast signal is mainly through? Tianlian? The relay satellite returned to the ground. In this space lecture, the flight control team also adopted the method of double relay satellites for the first time to ensure the stable return of images and voices.
Former Xudong of Beijing Aerospace Control Center Communication Dispatching Company: One antenna chain relay satellite tracks the sky experimental module, and the other relay satellite tracks the sky and the core module. The two tracking arcs overlap. First, the sky experiment module downloads images and voices, and then we switch images and voices in the overlapping arc between two stars.
In order to ensure that the images and sounds transmitted back to the ground are stable and smooth, scientists and technicians have also made careful plans to present a wonderful space teaching for the majority of young people.
Sun Yu, Communication System Engineer of Beijing Aerospace Control Center: On the equipment level, the image and voice transmission adopts the implementation scheme of active and standby, and the link transmission also adopts the dual standby mode of dedicated line and connected line. In addition, CCTV optical terminal is used as the third channel to further improve the image voice quality and transmission reliability.
What kind of experimental projects can be selected for "Tiangong Classroom"?
Shi Yusheng, astronaut training instructor of China Astronaut Research and Training Center: When we choose experimental projects, we mainly consider the following points: First, the phenomenon difference between heaven and earth must be significant; Second, the scientific principles should be clear; Third, the overall visual effect is good, and it should be spread, which can play a real popular science effect. Compared with previous lectures, this lecture has further innovation. First, the astronaut teacher will teach in the new experimental cabin of the candlestick, demonstrating different experimental phenomena between heaven and earth, and further stimulating students' thinking about daily phenomena; At the same time, it will also show the scientific experimental operation of the plant research project of the space station for the first time, and further demonstrate the powerful scientific research capability of China's space station as a national space laboratory.
? Tiangong classroom? The first lesson of space science popularization is really wonderful.
Review the first two times? Tiangong classroom? . Last year, 65438+February 9, Tiangong classroom? At the beginning of the first lesson, the astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu of Shenzhou XIII who were flying in orbit at that time brought a wonderful space science popularization to the majority of young people. The demonstration of space turning, water film tension and effervescent tablet experiment opened the eyes of the students.
In the lecture, the astronauts introduced the working and living scenes of the space station, demonstrated the magical phenomena such as cytology experiment, human movement and liquid surface tension in microgravity environment, and explained the scientific principles behind the experiment.
Adoption without external help? Swimming? Neither posture nor blowing method can realize the freedom of turning. When you raise your arm and draw a circle, you can slowly turn in a certain direction.
In the experiment of buoyancy disappearance, astronaut Wang Yaping put the ping-pong ball into the water and pushed it below the water surface with a straw. Table tennis doesn't float to the surface of the water as fast as it does on the earth.
In the water film tension experiment, Wang Yaping made a water film. When Wang Yaping put beautiful paper flowers on the water film, the flowers bloomed in space.
In the optical experiment of water polo, Wang Yaping injected bubbles into the water polo, and two figures, one positive and one negative, were formed in the water polo.
In the experiment of effervescent tablets, Wang Yaping put effervescent tablets into a water ball filled with blue pigment, and a large number of bubbles were produced after the effervescent tablets were put into water.
? Tiangong classroom? Lesson two? Ice and snow top flow? Go into battle together
On March 23rd this year, the Shenzhou XIII astronauts brought us here again? Tiangong classroom? Lesson two, space? Ice and snow? Another wave of demonstrations, such as experiments in space and parabolic experiments, left a deep impression on the students.
In the 45-minute lecture, the astronauts demonstrated the space under microgravity. Ice and snow? Experiments, liquid bridge demonstration experiments, water-oil separation experiments and space parabolic experiments explain the scientific principles behind the experimental phenomena, and also show some space science facilities.
In space? Ice and snow? In the experiment, the supersaturated sodium acetate solution ball floats in the air, which is a crystal change in the suspended state, and its appearance and crystal structure are not affected by gravity.
In the demonstration experiment of liquid bridge, the surface tension of water in weightless environment was demonstrated to students.
On the ground, water and oil are packed in a container, which will naturally stratify. What will happen to the space station? It can be seen that water and oil are not naturally stratified. However, astronaut Ye Guangfu quickly rotated the vial to separate water and oil by centrifugation.
Parabolic experiment in space, Wang Yaping and Ye Guang Fu are throwing ice piers. The ice mound did not land as quickly as it did on the ground, but moved in an approximately uniform straight line along the original direction. In the microgravity environment of the space station, the motion of objects is almost unaffected by gravity.
Space teaching has been carried out many times. What is the focus of curriculum design?
? Tiangong classroom? Since the launch, two space lectures have been successfully held. Tiangong classroom? The curriculum of the third class has also been announced, so what are the differences in the curriculum design of several space classes?
? Tiangong classroom? Chen Zheng, associate professor of Beijing Jiaotong University, member of the teaching expert group? Tiangong classroom? The first lesson is mainly aimed at primary school students and pays attention to fun. ? Tiangong classroom? The second lesson is mainly aimed at junior high school students, radiating downward to primary school students and upward to high school students and fans of the whole society. The content of space science experiments has increased, and at the same time, it can let everyone know what scientists are doing on it and what scientific experiments are doing. ? Tiangong classroom? The third lesson will be deeper, more stereoscopic and more participatory.