It’s time for theory class again, but Linwan is still too busy and didn’t come. The lecturer was still Liu Yiyi. Liu Yiyi walked into the classroom in high spirits. She picked up an electric chalk and randomly drew a circle, a five-pointed star, and a flying saucer on the huge blackboard. Then, ask the team members: Who can tell me exactly what is drawn?
Lang Bute raised his hand and was the first to speak: Report, I know, a ball, a badge, and a plate.
Lan Junguo stood up and laughed at Lang Bute: Princess, you are wrong! It should be an earth, a star, and a spaceship.
Na Feifei stood up in a hurry: I thought it was a sky, a moon, and a disc ship.
Please sit down. What you said is correct, but it's not comprehensive. I asked another classmate. Liu Yiyi was very interested. Her eyes swept over everyone's face, and finally stopped on Xi Liyan's face.
Xi Liyan, please answer, what did I draw? Liu Yiyi asked seriously.
Xi Liyan stood up and answered without thinking: a round cake, a water chestnut, and a piece of bread.
Hahaha! Hahaha…….
Everyone laughed. Liu Yiyi also laughed. But Liu Yiyi knew that Xian Liyan did it on purpose.
good! Liu Yiyi smiled interestingly, without revealing anything, and humorously followed Xi Liyan's train of thought and said: Xi Liyan is afraid that everyone will be hungry, these are all delicacies! But what I want to tell you is that we are continuing the previous lesson with knowledge related to our training.
Today, I will tell you some knowledge about the universe and spacecraft. We think of this big circle as a universe. This five-pointed star can represent the planet in the universe. This disc represents a spacecraft that can travel through the universe. We mentioned in the previous lesson that the biggest difficulty in realizing space navigation is speed.
The astronomical light year originally refers to the distance traveled by light in one year. Nowadays, light years have been extended to speed. In other words, astronomical speed is the speed of light travel per year, which is one light year. What if there is one light year per month, one light year per hour, and one light year per second? Recently, when I was sleeping, I was thinking about a question and suddenly got inspiration. There are many galaxies like the solar system in our galaxy, and the planets in the solar system move according to their own laws.
I believe that there are more mysterious forces in the universe, which are lunar stars of all sizes that we cannot discover. There are luminous planets and there are non-luminous planets. The planet that does not emit light is what I call the lunar star. What is the lunar star? I personally think it is a black hole. A black hole is also a celestial body. It's definitely not one.
Interestingly, some scientists have proposed the Big Bang theory, saying that the original universe was caused by a singularity that caused the Big Bang.
I guess this scientist is not original. He came up with it inspired by human medicine and life gestation. Think about it, everyone, the initial formation of life begins with a fertilized egg. The continuous division of cells grows human life; therefore, the scientist imagined that the universe was also nurtured in this way.
Galaxies and planets also explode into the universe like cells dividing. However, I have questioned the correctness of this theory more than once.
A fertilized egg depends on the development and growth of the human body. What does the first singularity of the universe depend on? Where does the singularity breed the explosion? If the singularity is the original black hole particle, then this black hole particle is still in the universe, and the original Big Bang theory cannot be talked about. I still believe in the pocket theory of the universe. The universe is endless, just like numbers. It's too big to be the largest, and you can't tell the biggest, but the biggest does exist; it's too small to be the smallest, and you can't tell the smallest, but the smallest does exist.
Therefore, our study and exploration of the universe can only be within a limited scope. The space-time in the universe can be distorted, but not one, but countless. Sunlight is not always direct, it can bend. Sunlight cannot penetrate the flat imaging mirror and is reflected. This phenomenon is a kind of bending and distortion of light.
To build a spacecraft faster than the speed of light, it can be achieved in a distorted space of time and space, or it can be achieved by using flow particles and quantum pipelines. Our Time Train developed such technology. In order to master this advanced theoretical technology, we must start from the basic theory. Our basic theory is to learn the design principles of rockets and spacecrafts. As astronauts must learn flight kinematics, meteorology, astronomy, aerospace communications, equipment testing, and aerospace medicine.
That's something to be excited about. In these theoretical courses, you have all studied more or less in a certain field before being selected. Here, we only briefly discuss and explain it. Otherwise, even if we describe one year in detail, you may not be able to fully understand and grasp it.
Report to the instructor, I have a question that I don’t understand. Na Feifei suddenly stood up and asked: What is aerospace medicine?
sit down. very good! Liu Yiyi smiled and explained with interest: Aerospace medicine is a subject that studies the survival and work of astronauts in normal and special environments. I don’t need to introduce the normal environment, everyone understands it.
Who will answer, what is a normal environment? Liu Yiyi suddenly asked a question.
Di Fanzhou raised his hand and answered: Ordinary living environment and habitual environment are normal environments. For example, when we travel, make friends, study, and work together, we usually go to the market to buy food, go to the mall to shop, go to the company to work, watch movies, play ball, run, etc.
please sit down. Liu Yiyi was in high spirits, with bright eyes and an energetic expression: But what I want to say is how astronauts should survive and work in special circumstances.
The first thing astronauts face is decompression injury. We are used to and adapted to the atmospheric pressure on Earth. The air pressure in the universe is very different from the air pressure on the earth's surface. This is a great challenge for an astronaut. Oxygen deficiency at high altitudes is also a problem that affects the normal life and work of astronauts. How astronauts can survive and work in the special environment of high altitude lack of oxygen is another test.
The gravitational effect of the earth is also different from that of the universe. This brings us to the issue of weightlessness. The depths of the universe are almost in a vacuum state. Protecting the astronauts themselves and their equipment is the basic guarantee for the safety of astronauts.
Also, astronauts must wear special space suits because cosmic radiation is something astronauts will inevitably face and experience. Finally, there is the issue of astronauts’ food health. How to eat and drink is something astronauts must consider and experience. The particularity of the space environment will greatly affect the survival and work of astronauts.
Therefore, to put it bluntly, aerospace medicine is life-saving medicine. What I said is too common, but very practical. Only by experiencing the initial scientific theoretical study can we understand and master these theoretical knowledge. Please be sure to take it seriously and study strictly. Only if you pass the learning assessment at this stage will you have the ability and qualifications to enter the next round of learning and training.
(End of chapter)
