Reflections on A Brief History of Time

After reading a book, I believe everyone has accumulated their own reading comprehension. At this time, the most critical feeling after reading can't be forgotten. So how should we write the post-reading? The following are my thoughts on A Brief History of Time. Welcome to read and collect. A brief history of time 1

A brief history of time written by Professor Stephen Hawking was published in 1988, which answered how the universe was born. Where did it come from? Where to go again? The problem. The book holds that the universe we live in now has its own historical starting point. It was born about 15 billion years ago. At that time, the universe was just a point, occupying no space and having no concept of time. At this point, there was a big explosion, and time and space began to form. At first, the temperature of the universe was extremely high. With the passage of time, the space became bigger and bigger, and the temperature became lower and lower. The energy and matter in the universe constantly had complex reactions, gradually forming galaxies, and the space continued to expand and expand. Until today, the universe is still expanding. About 5 billion years ago, the sun formed. The earth was formed about 4.6 billion years ago. The universe continues to expand, and it will expand in the future. Maybe after expanding to a certain extent, the universe begins to shrink, and it may shrink into a point, a point that does not occupy space. By then, time is over. Whether this will happen or not is still uncertain. What happened before the big bang? I don't know. We'll never know. This is the theoretical basis of the Big Bang universe. I think the first half of what Hawking said is right and the second half is wrong. It is right that the big bang happened in the universe and the space expanded with time. But the universe will not expand to a certain extent and then start to shrink until it shrinks to a point where it becomes a black hole, and then another big explosion will occur. The universe will keep expanding! I think there are many black holes in the universe. They are the seeds of the Big Bang. These black holes constantly absorb the matter in the universe and keep expanding until they reach the critical point of the Big Bang. These black holes constantly absorb the matter in the universe, and some of them come from other black holes, such as galaxies and so on. That is to say, black holes constantly produce big explosions, and at the same time, black holes are constantly produced due to the polymerization of matter. In this process, matter is communicating, and Hawking's theory says that matter is not communicating in this process, which is Hawking's mistake. Reflections on A Brief History of Time 2

Hawking initially thought that the contraction phase was only the time inversion of the expansion phase. People in the contraction phase will live in a backward way. They will die before they are born and become younger as the universe shrinks.

This is a very interesting argument, because in this case, people can predict tomorrow's world and make a transition from being old to being ignorant. This is a state that sounds very mysterious: people can see the broken cups gradually merging together, and they can also see the launched arrows return to the original point. This is a violation of the psychological concept of time. After all, the homework you just finished may be blank the next minute. To tell the truth, even if it is written in science fiction, it is difficult to describe this state and it is impossible to justify the story.

Of course, Hawking later gave up this view, although we are not sure whether the new view is correct. It is precisely because time has a direction that there is infinite expectation for the future. Imagine that future time travel can really be carried out, whether it is from the past to the future or from the future to the past, it will have a great impact: if it is not controlled, the world will surely fall into chaos. Like the future light cone and the past light cone, the change of a small event may gradually spread to the future and the past. The butterfly effect tells us that this may lead to the collapse of time and space, and sometimes we wonder what the meaning of human existence is. This is an idea that came into being when I was a child, knowing that human life span is only a few decades and that the earth has gone through billions of years of evolution.

No matter how brilliant a figure is, it can only be a flash in the pan. Qin Shihuang can't see the Xi 'an high-speed railway, and Plato doesn't know the more complicated social relations. Even Hawking can only stay at 3.14 and can't hear the church bell tomorrow. When I was a child, I sometimes thought that there would be no one in this world in a few decades, and I even secretly cried because I felt that I could not see the farther future. Now, I still can't get over the fact that people's existence is updating too fast, and it is bound within 36,5 days. A Brief History of Time 3

A Brief History of Time is a classic book about cosmology written by Stephen Hawking, a great British physicist and the founder of black hole theory and "Big Bang" theory. It is a popular science model that popularizes advanced theoretical physics.

"everything theory is always temporary: you can never prove it. No matter how many times the results of experiments are consistent with a certain theory, you can never conclude that the next result will not contradict it. " It's the conclusion I got from reading A Brief History of Time. The general meaning of this sentence is that you can never say that all physical theories are true, even if you have guessed them accurately for thousands of times, as long as there is an inappropriate inference next time, then this theory will not be established.

As I read Marx's motto on the Internet, think about everything, in other words, doubt the spirit. The spirit of doubt is the driving force for human beings to go. Only in this way will politeness be improved, otherwise the results will only stagnate. I have never thought of this idea before.

after reading this book, there are always many questions in my mind. Is there a big explosion in the universe? Is the universe an infinitesimal point? Will it collapse or eventually stabilize? Is the universe boundless or has an end? Can man invent a time machine and go back in time? All the problems are coming.

Hawking once said: "My goal is simple, that is, to complete my understanding of the universe, including why the universe exists." Including Hawking in 24 also announced that the theory of black holes was wrong. He said: "Black holes are not what he and most other physicists thought before.

The universe is mysterious and dark, but there is such a universe in our hearts! After reading A Brief History of Time, 4

Time is an abstract concept, although in fact we have visualized it. For example, when we mention time, you may think of an alarm clock ticking, or an electronic watch constantly changing numbers, and so on. As for time, I read A Brief History of Time, a classic book about cosmology written by stephen hawking, a great British physicist and the founder of the black hole theory and the "Big Bang" theory, which is a popular science model to popularize advanced theoretical physics.

"everything theory is always temporary: you can never prove it. No matter how many times the results of experiments are consistent with a certain theory, you can never conclude that the next result will not contradict it. " It's the conclusion I got from reading A Brief History of Time. The general meaning of this sentence is that you can never say that all physical theories are true, even if you have guessed them accurately for thousands of times, as long as there is an inconsistent inference next time, then this theory will not be established.

As I read Marx's motto on the Internet, think about everything, in other words, doubt the spirit. The spirit of doubt is the driving force for human beings to go. Only in this way can civilization progress, otherwise the results it will face will only stagnate. I have never thought of this idea before.

after reading this book, many questions have been swirling in my mind. Is there a big explosion in the universe? Is the universe an infinitesimal point? Will it collapse, or will it finally stabilize? Is the universe boundless or has an end? Can man invent a time machine and go back in time? All the problems are coming.

Hawking once said: "My goal is simple, that is, to complete my understanding of the universe, including why the universe exists." Including Hawking in 24 also announced that the theory of black holes was wrong. He said: "Black holes are not what he and most other physicists thought before.

The universe is mysterious and dark, but there is such a universe in our hearts! After reading A Brief History of Time, 5

The vast universe and mysterious earth have unveiled their mysterious veils one by one after A Brief History of Time.

Stephen Hawking, author of A Brief History of Time. He faced difficulties without fear, overcame diseases and worked miracles. He let us know that defects are not obstacles to success. He used his whole life to fulfill his promise, and he fought for the subject he loved all his life. We can say that Hawking is the greatest physicist in the 2th century.

Holding this heavy book full of knowledge, I read it carefully. The first thing you see is a big clock with an oval dial, which is deeply concave in the middle. Endless time should be its representative. I thought this world-famous popular science book would be boring and maybe a little laborious, but now I have to change my mind.

Mr. Hawking turns complicated and difficult sentences into humorous language, which helps you quickly understand the knowledge and mysteries of the universe.

I deeply remember Mr. Hawking's famous saying, that is, "A man without a dream is tantamount to death". Yes, Mr. Hawking has been confined to a wheelchair for many years, but his thoughts are still active. It flies out of the earth, out of the solar system, out of the Milky Way, and even into the depths of the universe billions of light years away.

Mr. Hawking avoids external interference for various reasons, and often thinks about the fate of the universe alone in his room. He can make any sacrifice and give up for his dream and career. Isn't the brilliant achievement he enjoys now bought with sweat and hard work?

After reading this book, I have broadened my horizons. Now I find that I have only a little knowledge. It made me fall in love with the mysterious universe and feel the charm of science. Science is power. In the 21st century, how will we strengthen our national strength, develop our economy and make China stand firm in the East? The answer is science. After reading A Brief History of Time, 6

The universe is an eternal topic for human beings. From Aristotle's discovery to Ptolemy's model to Copernicus's improvement, it is finally proved that the sun is the center of the solar system. And the earth goes around the sun. This truth is the result of how many astronomers and scientists dedicated their lives and persisted in exploration! Their spirit move us. It is this firmness that has profoundly changed human thinking and made modern science have a deeper understanding of the universe.

Zong Baihua once said: "The universe is endless life and abundant power, but it is also a strict order and a complete harmony." When we look up at the sky, do we really see the secrets of the universe? While we are questioning, A Brief History of Time has given us an answer.

A Brief History of Time has become a milestone in scientific works. The author's charming and vivid expression, the most authoritative language and the most accurate data make the awesome topic of the universe clearer.

Time has made these profound truths gradually understood by people. Kurdish Godel discovered a new solution to Einstein's equation, which allowed the laws of physics to predict time travel, and later scientists discovered superluminal time travel.

this means that you can travel in reverse time. You can go back to 28, and if you travel too fast, you can even buy tickets to watch the game before the Beijing Olympic Games.

The summary of these truths is due to Hawking. Although he was ill at the age of 21, he never gave up and expressed his views in a wheelchair. His struggle surprised and praised us. He proved the meaning and value of his life with his actions, and made him known as one of the most outstanding physicists after Einstein.

a person is not discouraged by the bad environment, keeps working hard and finally finds his own value. Life is awesome, we should cherish it and be a strong and brave person.

We explore and discover from the universe. I believe that as long as we use our eyes that are good at discovering, we will find happiness that cannot be described in words! Comments on A Brief History of Time 7

The origin of the universe is really wonderful, just as the Tao Te Ching said, it can be described as "mysterious and mysterious, the door to all wonders". Both singularity and inflation theory try to explain how the Big Bang and the universe developed after it from the perspective of observed phenomena. Of course, some people will choose the theory that the reason why the universe develops so much is because of our existence.

All kinds of theories can explain some phenomena, but they still can't give the most accurate explanation for the origin of the universe, so it doesn't seem to be a joke that a creator turned the gear of the Big Bang. One second after the big bang, the temperature dropped to about 1 billion degrees, which is about 1 times the temperature of the sun center, which is the temperature reached by the explosion of hydrogen bombs. This is the first time to know that the hydrogen bomb explosion can reach such a temperature. The melting point of iron is only over 1,5 degrees Celsius, and the highest melting point material, tantalum-hafnium carbide alloy, is only 3,99 degrees Celsius. 1 billion degrees is really an unimaginable and indescribable temperature-you can't even find any words to describe it. But now I know that humans have been able to make weapons that can explode up to 1 billion degrees, and I can't think of anything that can stop a hydrogen bomb from exploding at close range. Think about it. Humans are still fragile. From the troubles of diseases to the attacks of weapons, everything can take away human life.

But in a sense, human beings are also powerful. They can make weapons to destroy the earth, and they can also see galaxies beyond light years. A Brief History of Time not only brought me thinking in the physical sense, but also inspired me in the life level. Wisdom, an intangible existence, can also be reflected in several chromosomes, and it has gone through the evolution from particles to life for 3 billion years. I believe that there will be genetically modified people in the future, but I don't know if humans have rushed out of the solar system by then.

At present, there is a constant debate about the origin of the universe. Maybe in a few centuries, human beings can make a universe by themselves-as simple as blowing bubbles. Author: Li Mingzhe's A Brief History of Time 8

A Brief History of Time was written by Stephen Hawking, a great British physicist and the founder of the black hole theory and the Big Bang. This book gives a systematic and comprehensive understanding of cosmology thoughts and theories, and integrates a lot of background information and theoretical data. This book takes us to distant galaxies, wonderful black holes and an incomparably vast universe.

Among them, the famous general theory of relativity in the book caught my eye the most. The universe used to be very small, and then the space will expand and a series of big explosions will occur. How amazing! The universe will slowly expand, so as to produce many familiar planets such as the earth, the sun, mercury and Saturn. General relativity itself cannot explain these characteristics or answer these questions, because it predicts that the universe began with infinite density at the singularity of the Big Bang. General relativity and all