800 words in the second lesson of Tiangong Classroom

The second lesson of "Tiangong Classroom" is scheduled to start at China Space Station on the afternoon of March 23rd, 2022. With the cooperation of Shenzhou XIII astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu, CCTV will broadcast live to the whole world. The following is an 800-word model essay of "The Second Lesson of Tiangong Classroom" compiled by me for your reference, hoping to help friends in need.

Comments on the second lesson of Tiangong Classroom 800 words 1 "Tiangong" is a space station independently developed by China. Needless to say, the name "Tiangong" was not casually named. It's like a palace with everything.

The space station is a "space hotel laboratory", where astronauts can stay for a short time and conduct various space research and experiments. Then why build a space station? The space station can test all kinds of technical equipment that may be used for space flight in the future. You can also get a "weightless" environment-a special environment that is difficult to stay on the ground for a long time. However, the cost of going to and from space is quite high. Being able to stay in space for a longer time at a time can reduce costs and improve work efficiency. So such a place with comprehensive functions that astronauts can live for a long time was born.

First of all, introduce the planning of our "palace".

Tianhe core cabin is the bedroom in the palace, mainly for astronauts to live in. Goods and manned spacecraft are used to transport goods and people, just like vehicles on the ground. The candlestick experimental module and the dream experimental module have not been completed yet. They are R&D laboratories in the "Palace" for various space experiments and scientific research.

There are all kinds of imaginable dangers in space, among which the threat comes from the sun as we know it. As we all know, the sun is the foundation of life on earth. It provides endless energy and nourishes the growth of all things. But the alpha and gamma rays it releases are very deadly. These two rays can easily penetrate your skin and destroy all cells in your body. Then why can we bask in the sun every day on the earth? That's because the earth's magnetic field and atmosphere will reflect or absorb them. This safety factor must be considered in the site selection of the space station. Internationally, the distance from the ground 1000 km is generally chosen. For the sake of safety, our "Tiangong" is located 400 kilometers above the ground. This can be protected by the earth's magnetic field and atmosphere, killing two birds with one stone.

In ancient times, it was said that the Temple of Heaven was in the clouds, and all kinds of immortals lived there. At present, many astronauts and scientists live in the "Tiangong". They are working hard for the progress of China's space science and technology in high altitude, so that we can no longer rely on foreign technology, and we can really look at the whole universe while overlooking the earth and have a deeper understanding of space.

So our "heavenly palace" is really a veritable heavenly palace! Perhaps this is the origin and beautiful meaning of the name "Tiangong".

The door of "Tiangong" has been opened, and the future can be expected!

Tiangong Classroom 2 Lesson 2 800 words "Flying dreams never lose weight, and scientific dreams have unlimited tension." Many years ago, "space teacher" Wang Yaping gave a lecture to more than 60 million students in China. Now she is once again on a trip to space, becoming the first female astronaut in China and the first female astronaut in China. Looking at the sound, the mysterious and distant deep space is getting closer and closer to me, and the beautiful "flying dream" is becoming a reality.

/kloc-in the early morning of 0/6, Shenzhou XIII was successfully launched, less than a month after the successful return of the Shenzhou XII manned spacecraft. A new "space travel trio" composed of Zhai Zhigang, Wang Yaping and Ye Guangfu went to China Space Station by manned spacecraft. This mission will achieve a number of "firsts" such as radial rendezvous and docking with the core cabin, transfer from a rescue ship to a formal mission ship, and will carry out more space science experiments and technical experiments on the basis of the Shenzhou 12 mission.

"Sit on the floor, travel 80,000 miles a day, and look at thousands of rivers." In 2003, the Shenzhou 5 spacecraft was launched with Yang Liwei at Jiuquan Satellite Launch Center, and it took 2 1 hour and 23 minutes to successfully return to the ground, realizing the Chinese nation's dream of flying for the first time. Since 18, there have been seven manned flights, with the interval from to. The frequency of "business trip" is faster, the contact is smoother and the preparation is more leisurely, which shows China's ability to stand on its own feet in science and technology. From "one-day tour" to "seasonal tour" to "in-depth tour" lasting for half a year, the "space business trip" takes longer, takes bigger, farther and firmer steps, and shows the self-confidence and pride of a big country.

From "Two Bombs and One Satellite" and "the Goddess Chang'e flying to the moon" to "Beidou" to guide the way, "Tiangong" to range rover and "Tian Wen" to explore the fire, and then to "Shenzhou" series to roam the sky, "xi He" to chase the sun ... Breakthrough again and again, step by step, the Chinese nation's exploration of space extends from the moon and Mars to the sun; As far as China people's eyes are concerned, they are looking up at the bright starry sky, searching for dark matter and gravitational waves, and even deeper unknown areas in space.

"The romance of China astronauts is to turn myths into reality". Indeed, in the vast space, more and more China space figures are composing the romantic feelings of the Chinese nation for the vast starry sky into realistic poems to explore space. According to the arrangement, the astronauts of Shenzhou XIII will stay in orbit for six months, and China people will spend the Spring Festival in space for the first time. Looking forward to the New Year's Eve, I can hear the blessings of my compatriots from space for the first time.

Comments on the second lesson of 800 words in Tiangong Classroom 3 The teaching objects of this Tiangong classroom are mainly teenagers, and the interactive mode between heaven and earth is adopted. Wang Yaping, the astronaut of Shenzhou XIII, is the main teacher, and Ye Guangfu and Zhai Zhigang are the teaching assistants, giving lectures on the spot.

Three "space teachers" showed three interesting scientific experiments for teenagers: table tennis experiment, water film experiment and effervescent tablet experiment. The students also carried out the above experiments on the ground. Because the weightlessness environment in space is completely different from the gravity environment on earth, they present completely different experimental phenomena, which arouse people's deep thinking.

For example, if students immerse table tennis in water, the ball will float on the water because of buoyancy. But in space, after the table tennis is immersed in the water, the ball is suspended in the water and will not fall even if it rotates back and forth in the air. According to Wang Yaping, this is because the buoyancy will disappear in the space station, so the ball will not be affected by buoyancy.

Let me start with the experiment that impressed me the most-the interesting water film experiment. Wang Yaping poured water into the metal ring to form a large water polo like a convex lens. When the origami flowers were put in, the flowers in the water polo opened, which was amazing. This is because the surface tension of water in weightless environment shows great strength, so water will not flow downwards, thus forming water polo. Inject bubbles into the water polo, which will divide the water polo into two parts, forming a positive image and a negative image. But Wang Yaping didn't tell us directly, but caused us to think, let us actively explore and discover the mysteries of science.

This lecture in the space station has greatly shocked me, greatly increased my interest in science and planted the seeds of exploring the universe in my heart.

Flowers in full bloom in the water are as prosperous as the motherland, blooming their own brilliance, warmth and beauty. In the live broadcast, we not only learned a lot of knowledge, but also saw the beautiful scenes of the earth's surface and space. Every star roaming in space and every drop of seawater in the sea carries the dreams of countless teenagers in China.

This is the second time that "Sky Class" has been held in China Space Station. We firmly believe that in the future, China Space Station will continue to use the unique and rich resources in space to guide and encourage young people to actively explore and carry forward the great scientific spirit. Let's continue to look forward to the next course with a heart that loves science and explores the future!

On March 23rd, my classmates and I watched the second lesson of China Aerospace Tiangong Class. The astronauts Zhai Zhigang, Wang Yaping and Ye Guangfu of Shenzhou XIII became "space teachers" again, giving us a very lively and interesting lesson.

202165438+On February 9th, the first lesson of "Tiangong Classroom" officially started. The astronauts Zhai Zhigang, Wang Yaping and Ye Guang Fu of Shenzhou XIII cooperated with each other to give lectures, which were splendid in China Space Station and broadcast live to the whole world. This is the first time that China astronauts have taught in space after eight years, and it is also the first time that China Space Station has taught in space. Their speeches were wonderful, successful and popular. After the first class, the second class of "Tiangong Classroom" is even more exciting.

This space teaching activity will continue to be conducted in the form of dialogue between heaven and earth. Astronauts will demonstrate space "ice and snow" experiment, liquid bridge demonstration experiment, water-oil separation experiment and space parabolic experiment in orbit, and introduce and display space science facilities. For example, the space "ice and snow" experiment demonstrated the crystallization of saturated liquid under weightlessness. The second lesson of "Tiangong Classroom" aims to spread the knowledge of space science and stimulate the enthusiasm of young people to pursue "scientific dreams" and realize "space dreams".

I still remember vividly the space experiments in the first lesson of Tiangong Classroom: "Space Fitness", "Cell Culture" and "Buoyancy Disappeared" ... Among them, what impressed me deeply was a series of experiments on water by Wang Yaping astronauts. Due to weightlessness, water presents a wonderful phenomenon completely different from the ground. In the second lesson of Tiangong Classroom, what impressed me the most was the water-oil separation experiment. As we all know, water and oil are separated in normal environment. However, the phenomenon of water-oil stratification disappears in weightlessness environment, and the experiment also demonstrates the phenomenon of stratification through the centrifugal force generated by rotation. It's incredible!

Through the Tiangong classroom, I not only learned wonderful scientific knowledge, but also felt the power of science and technology. The rapid development of China's space industry, the establishment of space station and the realization of flying dreams all depend on advanced space science and technology. Looking up at the starry sky, I will work harder to learn scientific knowledge and contribute to the future development of science and technology in China.

The "topic selection" condition of the second lesson in Tiangong classroom is that the materials and equipment needed for the experiment must be safe and reliable, with small mass, small volume and low power consumption, which will not affect the health of astronauts and will not pollute the cockpit environment; Of course, originality, simplicity, feasibility and other factors should also be considered, and astronauts should not spend a lot of time.

"At that time, a magnet experiment was also designed, but considering that magnets may have an impact on the internal instruments and equipment of the spacecraft, this experiment was abandoned." Pang Zhihao added that in addition, chemical experiments are dangerous. For safety reasons, chemical experiments in space are usually carried out in experimental cabinets or glove boxes, which are difficult to present to students on the ground. Therefore, it is safer and more intuitive to choose physics experiment as the content of space teaching.

In order to do a good job in China's first space science education activity, China Manned Space Engineering Office, together with the Ministry of Education and China Association for Science and Technology, made a systematic and careful plan for the activity, and completed the preparation of courseware, teaching AIDS and ground lessons, and astronauts also made special preparations for it.

As Tiangong-1 is a precision aircraft, astronauts must be careful not to move too much and interfere with normal flight, and also be careful that floating experimental equipment and droplets affect the safety of the spacecraft.

As the keynote speaker, astronaut Wang Yaping made great efforts in preparing lessons. She carefully prepared the lecture content and humbly asked the professional teacher for lecture skills. Nie Haisheng, the commander, works as a teaching assistant in the space class, and is responsible for coordinating with Wang Yaping to manage teaching AIDS and maintain class order. Astronaut Zhang is almost tied to the bulkhead to finish the lecture, because as a cameraman, if he wants to keep his balance in weightlessness, he must fix himself on the bulkhead with a strap, so that he can keep stable shooting with a hand-held camera for a long time and send the wonderful pictures of space teaching back to the ground classroom.

"In the future, the experimental content and form of space teaching will become more and more novel. For example, the comparison experiment between heaven and earth compares the difference between silkworms or spiders spinning in space and on the ground, and observes how butterflies fly in space. " Pang Zhihao introduced that relevant domestic departments have also begun to organize young people to design space experiments and regularly invite experts to review them. It is expected that an excellent experimental scheme will be implemented in China Space Station in the future.