Cosmic reflection in the shell

After reading a book, I believe everyone must understand a lot. Write a review and record your harvest and contribution. In order to make you feel no headache after writing and reading, the following are my comments on the universe in the shell, hoping to help you.

Reflections on the Universe in the Shell 1 The Universe in the Shell is named after Shakespeare's famous play Hamlet. Its metaphor is multiple. Hamlet thinks that even though he is locked in a shell, he still thinks he is the king of space. In a broad sense, particles, life and basic conditions are all similar to fruit shells, but it is not clear which of them thinks he is the king of infinite space. Modern quantum cosmology believes that the whole universe evolved from a shell-like instanton, and the quantum folds on the shell contain the passwords of all structures in the universe.

After reading this book, I saw the infinite space of the universe and the great discoveries of many scientists. Einstein's two basic theories: relativity and quantum theory. General relativity transforms space and time from the passive background of events to the active participants in cosmic dynamics. This leads to a big problem, which is still the frontier of physics in 2 1 century.

Professor Hawking brought us into fairyland with his unique enthusiasm. Particles, membranes and chords move in eleven dimensions, and black holes evaporate and die with the secrets they carry. The seeds created by our universe are just the fruits of smiles.

The ultimate goal of science is to provide a simple theory to describe the whole universe. However, the method followed by most scientists is to divide the problem into two parts. First of all, there are some laws that tell us how the universe changes with time: (If we know what the universe looks like at any moment, then these laws can tell us what the universe will look like at any moment in the future. )

Second, about the initial state of the universe. Some people think that science should only ask the first part, and they think that the question of initial state should belong to metaphysics or religion. They will say that Almighty God can start the universe at will. Maybe so. However, in that case, he can also make the universe evolve in a completely arbitrary way. However, it seems that he chose the universe to evolve in a very regular and regular way. Therefore, it seems reasonable to assume that there are laws that limit the initial state.

As the saying goes, a journey full of hope is better than the arrival of the destination. We seek to discover and stimulate creativity not only in science, but also in all fields. I hope we can sit up with every little thing around us and experience the universe in the shell!

Reflection on the universe in the shell 2 "Ningzhou has multiple histories, and each history is determined by tiny hard fruits." This is my favorite sentence in this book. This is simple, but it also hides profound truth. Modern quantum cosmology holds that "the whole universe evolved from a shell-like instanton, and the quantum wrinkles on the shell contain the passwords of all structures in the universe."

Everyone should know one person-Stephen Hawking, who is a famous professor at Cambridge University. Why should I mention him? Hawking was born in1942,65438+10.8. /kloc-when he was 0/7 years old, Hawking entered Oxford University, but God didn't want to take care of such an excellent person. At the age of 2 1, Hawking was paralyzed and could only move three fingers. However, this celebrity typed a book with only three fingers, which is admirable!

According to Mr Hawking's idea, black holes will evaporate with the secrets they carry and disappear in front of people. The seed of the ever-changing universe is just a smiling fruit. The universe is an expanding bubble. Perhaps it will continue to expand until it is completely broken. At the same time, new things will be produced in the process of expansion. However, if the universe really breaks down, time, living space and so on will cease to exist.

After reading this book, we will find the smallness of human beings. If so, what were we doing on the day the universe broke down, or did we die? The title of "the universe in the shell" comes from Shakespeare's play Hamlet. One of the lines goes like this: "Even if I am locked in a shell, I still think I am the king of infinite space." This sentence can be compared to Hawking, whose pursuit and clever brain are the best proof.

After reading The Universe in the Shell, I studied liberal arts. I haven't been exposed to physics since the second year of high school, and the mathematics I have been exposed to since then is very simple. But I just like reading popular science works. Maybe it's a little confusing, something like Tao Yuanming's Little Knowledge? Or maybe, that kind of eyes are full of knowledge points, which meets my inner need of "opening books is beneficial"?

Anyway, this is the second time I have picked up the universe in my shell. Does the vast universe have boundaries? Where did it come from and where will it go? Everyone who looks up at the starry sky alone on a summer night has thought about this question. Hawking is undoubtedly the most likely person to answer this question in modern times. His writing style is quite good, so his fame, to a great extent, comes not from his academic achievements but from his popular science works. Wu's translation is also very good, basically without damaging the charm of the original. Unfortunately, I really can only understand this metaphor. Hehe, understanding metaphor is enough. No one asked readers to test Hawking's conclusion again with mathematics. He said that "bubble" is mathematically equivalent to "movie", and the probability of going back to the past is close to zero. I want it all. Mass bending time and space, quantum uncertainty principle, historical summation of the universe, hairy black holes, closed time loop and superstring theory. He took me to so many scientific virgin lands and showed them to me one by one like a tour guide. I don't understand his language. I have made so many wonderful illustrations. ...

For me, Hawking is like Hamlet. "Even if I am locked in a shell, I still think I am the king of infinite space."

Reflection on Reading Cosmos in Shell 4 Last night, I finished reading Cosmos in Shell written by Hawking in one breath. Although I don't understand it, and I usually have to read it four or five times in the middle of a sentence, I still can't bear to put the book down.

After reading this book, I think it should be related to another book written by Hawking, The Origin and Destination of the Universe. Because theory of everything mentioned in The Origin and Destination of the Universe (combining all local theories into a "theory of everything", if found according to Hawking's words, it will be the end of theoretical physics and the ultimate victory of mankind) is the M theory mentioned in The Universe in the Shell (also called string theory). Among them, M theory includes 0- alien, type I, IIB, IIA, E- alien and 1 1 dimensional supergravity. Among them, 1 1 dimensional supergravity, P film, M theory, quantum mechanics, general relativity, 10 dimensional film, superstring and black hole are designed. The center of linking these things in M theory is the goal that needs to be found in today's research.

Hawking thinks that people live in the space of 10 or10/0, but people don't realize that the scale of the extra dimension is too small to reach Planck's scale (Planck appeared in two physics compulsory books of Grade One, the length of Planck is 10-33 cm, and the time of Planck is/.

It is generally believed that the universe is expanding, because the Doppler effect and microwave radiation received from the universe have confirmed this.

Hawking believes that the large extra dimension implies that we live in an embryonic world, a four-dimensional "surface" or "membrane" of high-dimensional space-time. Strong force, weak force and electromagnetic force will all be trapped in this embryo, so any physical problem that has nothing to do with gravity will be the same as 4-D space-time. Gravity will spread to the whole high-dimensional space. In other words, gravity may decrease with distance faster than previously estimated.

So the orbit of the planet will be unstable: the planet will either fall into the sun or escape from the sun into space. However, this effect will not happen if the extra dimension ends in another embryo not far from the embryo on which human beings depend. Then, for the distance beyond the separation of two embryos, gravity cannot spread freely like the electromagnetic force mentioned above, but is effectively confined within the embryo, and the decline rate is just suitable for the planetary orbit.

Hawking mentioned in The Origin and Destination of the Universe that the Milky Way is a rod-spinning galaxy. Stars rotate slowly around the center of the Milky Way for about 200 million years. If Kepler's law is applied, the speed of the peripheral stars should be slower than that near the center of the galaxy, but the observation results are different, and the speed of the stars in the whole galaxy is roughly the same. Therefore, astronomers believe that there are a lot of dark matter in the Milky Way, most of which are distributed outside the Milky Way, thus accelerating the movement of stars in this part of the region. The research on the motion of all galaxies in the cluster of galaxies has also reached the same conclusion.

Hawking believes that in the four-dimensional "membrane" world, human beings live in an embryo and there is another "shadow" embryo nearby. Because light is confined in one embryo and cannot spread to another, human beings can't see the shadow world. But humans will feel the gravitational influence of the matter in the shadow embryo. This kind of gravity will appear as a "dark" source in the embryonic world of human life. The only way to detect "shadow" embryos is through gravity.

Hawking said that strings, membranes and embryos "have quantum fluctuations like anything else in the universe." These quantum fluctuations make objects such as embryos spontaneously produce and disappear. This process is a bit like the formation of steam bubbles in boiling water. Heisenberg uncertainty principle in quantum mechanics leads to the birth of embryos from bubbles. If this four-dimensional bubble continues to grow, then people living on this bubble will feel that the universe is expanding.

According to Hawking's unbounded hypothesis (Hawking mentioned in The Origin and Destination of the Universe that the universe is finite and unbounded, just like the surface of the earth, which has only two dimensions, and the only condition of the boundary of the universe is that there is no boundary), the spontaneous creation of the embryonic world has a history of wasting time. In this history, the universe is like a shell: a four-dimensional sphere. Only the shell is empty, and the 4-dimensional shell in this embryo world image is full: the history of human life in virtual time is a 4-dimensional ball, which is the boundary of a 5-dimensional bubble, while the remaining 5 or 6 dimensions curl and roll very little.

According to Hawking's theory, the history of an embryo in virtual time will determine its development in real time. High-dimensional bubbles have the highest probability of producing a completely smooth spherical 4-dimensional "shell" in virtual time; However, this corresponds to an embryo that expands forever in real time. Galaxies cannot be formed in this embryonic world, so intelligent life will not appear. However, the probability of high-dimensional bubbles producing a slightly unsmooth and aspheric four-dimensional "shell" in virtual time is slightly lower, but it can correspond to the process of deceleration and expansion in real time (the embryo has an accelerated expansion-expansion stage at first, and then the expansion slows down). In this process of deceleration and expansion, galaxies may form and intelligent life may appear. Interestingly, these intelligent creatures will create a theory of the universe and realize that they are from a four-dimensional "movie" that is not so smooth and not so round.

After reading "The Universe in the Shell" and "The Origin and Destination of the Universe", I have a feeling. Humans are too small, put in the vast universe, only stay in the theoretical stage, and have no strength to practice at all. And some human beings who want to challenge nature and the universe are too arrogant and ridiculous? Although they can say that human ontology determines the universe, people all over the world are unconvinced without conclusive evidence. Creationism is even more impossible. Do they want to talk about their almighty god? Unfortunately, dear God is not omnipotent. Can he make a stone that he can't lift?

I decided to review these two books when I was in college. At that time, I will definitely understand them more deeply and feel them more deeply!

Thoughts after reading "Universe in a Shell 5". Regardless of the content of this book, the author alone is enough to shock and admire people. The writer is Steven, a professor at Cambridge University. Mr hawking. He is a quantum physicist with only three fingers moving all over his body. It was with these three fingers that he wrote one book after another with the mouse. A Brief History of Time is his masterpiece.

The first chapter of "The Universe in the Shell" mainly introduces general relativity and special relativity, and how Einstein made further thinking and research on their basis, and also expounds Hawking's own views.

The second chapter talks about a hypothesis. The author assumes that time has a shape, and verifies that this assumption is consistent with relativity through quantum formula.

In the third chapter, the author is explaining the universe.

He believes that the universe has many heavy histories, and each history can be composed of tiny particles; The fourth chapter tells a prediction. Mr. Hawking predicted that in a state of supergravity (such as a black hole), time is curved, so how can we lower ourselves to adapt to the future? In the last two chapters, the possibility of traveling in time and space as creatures and our relationship with the universe are drawn up by using various conditions in the universe, and assumptions such as whether the place where we live is empty are also put forward.

The content of this book gave me a great shock. I won't be confused when I encounter other strange problems after reading it.

After reading The Universe in the Shell, I read this book again, which enriched my knowledge. The book says that space is not actually made up of three-dimensional units. As students see in many TV dramas, such as four-dimensional space and black hole crossing. It's not groundless There should be nine or ten "dimensions" that people often say. And three-dimensional is only the general direction of space composition. The "shells" in the title are particles and nucleons. The universe, a big space, is made up of many extremely complex substances such as stars, planets, galaxies and space. So the universe is a space without history, and it is still expanding outward. There is a mysterious thing in the universe _ black hole. From the statement in the book, we can indirectly piece together a message: there are many black holes! And this important information reminds me of a problem! This question is related to the movie Titanic, which is familiar to everyone, so it is not convenient for me to say more. Among them, it is said that Captain Smith really traveled in time, but he thought it only happened yesterday. Of course, this may be media hype, but what if Captain Smith travels through time after falling into the bottom of the sea? Is that why his memory is disordered?

As I said before, the universe will expand. Why does it swell? Because in the simplest virtual time history, the universe is a sphere, with two more dimensions than the earth. The universe determines the history of our real time. In this period of history, the universe is the same at every point in space, so it is expanding in time.

But the shell in the question: particles can cause many phenomena, such as predicting the future. A butterfly flapping its wings in the east longitude will cause heavy rain in new york Central Park. This is the plot of Jurassic Park. Reality: When butterflies flap their wings, many other factors will affect the weather, which is why the weather forecast is sometimes inaccurate, and it is also often said: "Butterfly effect."

There is also a book saying that the history of the universe is a curved surface that exists in virtual time. So I come to the conclusion that the universe is actually a distorted space-time. So there can be a lot of space and "dimension".

The above imaginary time and real time are the two complicated moments at the beginning of this book that have nothing to do with personal time. On the other hand, personal time is: when two people stand face to face, their time is the same, but when they move each other, their time is different.

I also think Hawking's last speech is wonderful! He said that Einstein said that space-time is not flat, and matter and energy in space-time can make it bend or even warp. This also gave me a clear answer to my guess.

I haven't fully understood this book until now. There is a lot of knowledge about space that I don't understand. When I know more knowledge, I will definitely know more about space.

After reading "The Universe in the Shell", I feel that there are seven silvery white characters with a black cover and a looming shell in the middle. It is open, and there is a universe in it, a universe in a chaotic void and a universe in a shell.

It looks so ordinary, but it attracts me. I hesitate to take it off the shelf. After reading stephen hawking's works, it seems certain. Like other books, it has a preface and a table of contents, but I can hardly understand it. This is not a good habit.

Relativity seems to be telling a story and Einstein's general theory of relativity, but it is by no means so simple. This book quickly introduced his brief history, rich illustrations and humorous language, which made me read seven chapters happily. In the process of reading, it seems to have a kind of magic, which makes me indulge in its wonderful world and take me soaring in the universe. Although I don't know much about physics, in its witty language and clear thinking, I saw many new things, such as black holes, superstrings, 10-dimensional movies, dimensional supergravity and other elements and substances that I have never seen before, which made me appreciate the wonders of this universe.

This looks like an ordinary physics book, but it covers a kind of beyond space, dimension and time power! Man is like a dust in the universe. We only have a limited body and limited time, but our thinking can be as boundless as the universe! What we know now may be just the tip of the iceberg. After reading this book, I understand that human potential is far greater than this iceberg.

Looking at the cover of the book, I thought of the author Stephen Hawking, who was slumped in a wheelchair with his head tilted to one side. He was confined to a wheelchair forever by a disease called Hu Jia's disease. He was paralyzed and could only move with two fingers. But! His thinking is not restricted at all. He can also think and imagine. His body has been bound by an abyss-like disease, but his soul and thoughts can also fly with us, even higher. He has already

I haven't walked for 50 years,

I haven't eaten by myself for 50 years, but the computer controlled by his two fingers has reached a brilliance that ordinary people can't achieve!

We have a healthy body, we still live the life we want, and we also live in the universe in the shell. When can we go to the peak of mankind like him, and when can we surpass that peak and compete with the vast universe!

After reading the whole book, I thought of Miranda's aria in Shakespeare's The Tempest:

Ah, the novel world of movies, with such wonderful creatures in it, is the universe in the shell!

After reading The Universe in the Shell 8, the book I read is called The Universe in the Shell, written by physicist Stephen Hawking.

When I read the preface of this book, I was moved by Mr. Hawking's persistent spirit. Hawking, a great scientist, was diagnosed with atrophic lateral spinal cord disease by doctors at the age of 22. The doctors said that he could only live for two years at most. But he is not bald like others. He thinks that in this case, I will only do something meaningful in these two years, and he has been studying and researching hard since then. But before long, he began to feel weaker and weaker, and even it was hard to climb the stairs, but he still didn't give up. Two years passed in a blink of an eye, but death didn't befall him. He could only live in a wheelchair. After another operation, he couldn't speak, but he didn't give in to his illness or fate, and continued his research. Finally, he became a great scientist and a professor at Cambridge University through his efforts.

Hawking's persistence, hard work and tenacious struggle deeply touched me. In front of such a giant, I am extremely ashamed. I think I'm afraid of hardship when I meet some difficulties at ordinary times. Hawking, a disabled person, reached the peak of science through his own efforts. So difficult that we shouldn't learn from him? Is there anything we normal people can't do? So hard that we shouldn't work as hard as Hawking? We should act immediately, study hard and become a scientific giant like Hawking.

After reading "The Universe in the Shell", I am full of curiosity about the future. I still remember when I was studying in a normal school, I followed my good friend Jing and asked her to read my divination. Wash the playing cards with joy, anxiety and expectation, then take out a card and hand it to her, then stare at her anxiously, waiting for her explanation. Every time, she would look at the playing cards and tell them to me as if there were words on them. Under normal circumstances, I believe what she said, and I have been happy or depressed for a long time because of these results. I still remember that. People always want to know what their future looks like, whether it's career or feelings or something else. The word "future" is mysterious when you think about it, and it contains too many unknowns. It always stands in front of you with a hazy veil. If you take a step forward, it will take a step back. You run, it runs, so it will always tempt you, make you uneasy and fascinate you. What would it be like if you met the future today? Some people say that I will rush over and hug him (her) tightly, or say, hi, how are you? So, here you are. What a poetic and exciting picture! We don't know where we were before we came to this world, and we don't know where we will go after we leave this world, because by chance, we magically exist in this world. Decades of absence is just a meteor that flashes in the vast universe, but at this moment, we really exist.

I should be a materialist, but for this world, I always feel that there is an irresistible mysterious force manipulating us, or a big hand controlling everything in the world. This is definitely not superstition. Although I don't believe in any religion, I believe that "holding your head three feet high has a god." I believe that people are doing and the sky is watching. All the good and bad are the experiences given to you by God. Good and bad can be transformed and interdependent, and there is a core driving force inside them, that is, "heart", and the situation will change accordingly. I am both positive and negative in my life. I do everything seriously every day, hoping to do what I can, and at the same time I always think pessimistically. Sometimes there must be something in life, and I can't always force it. Everything keeps pace with the times and cannot be forced. Perhaps, we are busy every day, trying to change, in fact, the opportunity has been set and unknown. Because of this, we are so eager to foresee the future in advance. However, what will happen even if we know the future? Hawking said that humans always want to control the future, or at least predict what will happen in the future. This is why astrology is so popular. In this chapter, he has been constantly demonstrating, constantly overthrowing and denying.

He also gave an example ~ "Jurassic Park" Everyone knows that a small storm in one place will cause great changes in another place. A butterfly flapping its wings in the east longitude will cause heavy rain in new york Central Park. The problem is that the sequence of events is unrepeatable. When a butterfly flaps its wings, many other factors will be different and will also affect the weather. This is why the weather forecast is so unreliable. Many people believe that the world is safe and predictable, and nothing unexpected will happen. However, if people take Einstein's general theory of relativity seriously, they must allow time and space to knot themselves and the possibility of information being lost in folding. He also gave an interesting example ~ When the starship ventured through a wormhole, something unexpected happened. Because he played poker with Newton and Einstein on the boat. Can it be understood that everything that can be predicted has its uncertainty in it, because there are too many unknown uncertainties in the process of world development and progress, and there must be something beyond human control, so the world can be predicted, but accuracy may be another problem.

Although I liked divination very much when I was a teenager, I didn't like these things when I really grew up. The past has passed, and the future has not yet begun. Live today well, and grasp the present is the most important thing. Why worry about an uncertain sentence and waste a good time at your fingertips? That's the stupidest thing!