How long is the second class in 2022 Tiangong Classroom?
It starts at 3: 40 pm on March 23, 2022 and lasts until 5 pm.
The content of the first lesson in Tiangong classroom
The content of the first lesson in Tiangong classroom
Display of astronauts' working and living scenes in orbit
-Zhai Zhigang introduces the secret weapon "penguin suit"
The astronauts Zhai Zhigang, Wang Yaping and Ye Guang Fu of Shenzhou XIII flight crew vividly introduced and displayed the working and living scenes of the space station.
Being in space, the weightless environment will cause the blood distribution of astronauts to be different from that on the ground, and the blood of lower limbs will swell, so the astronauts' faces will appear "fat". So, how will astronauts fight weightlessness through exercise?
Astronaut Zhai Zhigang said that weightlessness affects our cardiovascular system, bones and muscles. In order to prevent our muscles from shrinking due to weightlessness, there is a secret weapon besides treadmills, bicycles and stretchers in our space station. Do the students see any difference in this dress that Teacher Ye is wearing? From the outside, there is no difference. Let's look at its internal structure.
These are two adjusting rings of the chest drawstring, which are used to adjust the tightness of the chest elastic drawstring. These straps bind the human body tightly, so that the muscles can maintain a certain tension for a long time, which can effectively prevent muscle atrophy caused by weightlessness. The name of this suit is penguin suit.
During the lecture, netizens found Wang Yaping in the sleeping area of the space station, with her family photo on it. She also said that she can "talk to her family at night" on the space station. Let netizens feel that family members are always dependent!
Item 2
Space cytology research exhibition
-Ye Guangfu shows you the beating heart muscle cells in weightlessness.
Ye Guangfu, astronaut of Shenzhou XIII crew: At present, we are conducting research on cell growth and development under weightlessness. In the early stage, we have done a lot of research on cells. At different times, at different times and in different units, we have cultivated cells through an artificial mechanism in a state of complete weightlessness. Then compare the two groups of cells to see what changes their growth and morphology are under the condition of motivation and unpowered. Then we will further study its changing law and mechanism. And we also choose different types of cells to study, including skin stem cells and myocardial cells.
Ye Guangfu, astronaut of Shenzhou 13 crew: This is a picture of myocardial cells observed under a fluorescence microscope. Did the students see the flashing fluorescence? Do you know why? In fact, this is a reaction of the cell's own bioelectricity, because these cells are alive. It is amazing that we can see such a picture by using the special means of bioelectricity to stimulate fluorescence.
Ye Guangfu, astronaut of Shenzhou XIII crew: These are also myocardial cells. They shrink in the form of patches. You can take a closer look. They move like heart muscle, and their movements are very rhythmic. They are jumping happily inside, as if to tell everyone that we are alive and well. Isn't it amazing? Welcome to participate in cell research in space!
Item 3
Spatial steering
-Ye Guangfu tried to complete the space turn without the help of the handle.
A classmate in Beijing asked him if he could walk normally in space like on the ground. Ye Guang answered his question with action: No! It turns out that in space, without the help of gravity, people can't walk like on the ground, but just float around.
If you can't walk in space, what about walking around in space? The answer is not that easy! After trying many methods, Ye Guangfu finally turned around and succeeded.
"Hey, I'm floating." I took a deep breath. First, the secret weapon of space "penguin suit" was displayed, and then "spacewalk" was non-stop. Finally, he was asked to try to complete the space turn without the help of the handle. Ye Guangfu was called by netizens! # Teacher Ye, heavenly tool man #. Wang Yaping said: "Although Mr. Ye has worked hard, it seems that he has not succeeded yet ... Come on, work harder!"
Item 4
Buoyancy disappearance experiment
-Wang Yaping reveals why table tennis can stay in water in space.
In the first lesson of Tiangong Classroom, Wang Yaping also made an experiment of buoyancy disappearing. In space, table tennis doesn't float on the water like it does on the ground, but stays in the water. Why?
Astronaut Wang Yaping said that this phenomenon is completely different from that on the ground, because buoyancy is generated with gravity and almost disappears in the weightless environment in space, so table tennis can't float like it does on the ground.
Item 5
Water film tension experiment
-The flowers made by Wang Yaping and his daughter bloom in space.
In the "Tiangong Classroom", astronaut Wang Yaping, with the help of Zhai Zhigang and Ye Guangfu, took out an origami flower completed with his daughter and demonstrated the water film experiment. Subsequently, the flower "bloomed" in space.
Item 6
Water polo optical experiment
-Wang Yaping demonstrates how the water polo presents a positive image and a negative image in microgravity.
How to form water polo in weightless environment? Why are there positive and negative images? Wang Yaping will take you to do an interesting experiment.
Wang Yaping, astronaut of Shenzhou XIII: Now we pour water into the water film to make a big water balloon. As we all know, this is because the surface tension of water in weightlessness will show great power, so we can make water polo that cannot be made on the ground.
Wang Yaping, astronaut of Shenzhou XIII: Let's add some water to make the water polo bigger, rounder and more beautiful.
Wang Yaping, astronaut of Shenzhou XIII: Students, can you see an enlarged me now? I did this in the last space lecture, and we all know that this is the result of convex lens imaging.
Wang Yaping, astronaut of Shenzhou XIII: First, please ask Mr. Ye to extract the bubbles from the water polo, and then we will inject a big bubble into the water polo. Students, now you see two images, one is right and the other is wrong? It's hard to see on the ground.
Wang Yaping, astronaut of Shenzhou XIII: Students can also consider it. Why are there two images, one positive and one negative? Interested students can study it in depth. I can give you a hint here. This is because bubbles divide the water polo into two parts, which are imaged separately.
Item 7
Effervescent tablet experiment
-What happens when effervescent tablets are put into space water polo? Wang Yaping: Sweet and happy bubble ball.
As we all know, effervescent tablets produce a lot of bubbles when they meet water, so what happens when effervescent tablets meet water polo in space?
Today (9th), in the first class of Tiangong classroom, Wang Yaping, a space teacher, made such an experiment. I saw effervescent tablets bubbling constantly in the water polo, but in weightless environment, although bubbles were constantly generated, they did not leave the water polo. With more and more bubbles, the water polo has gradually become a "bubble ball" full of joy, and it produces bursts of fragrance.
Broadcast time of the second lesson in Tiangong classroom
According to the China Manned Space Engineering Office, the second phase of "Tiangong Classroom" is scheduled to start at China Space Station on March 23rd 15:40. The astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu of Shenzhou XIII will cooperate in teaching, and CCTV will broadcast live to the whole world.
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