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Stephen Hawking

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A Brief History of Time Kindle Edition

by Stephen Hawking (Author) Format: Kindle Edition

11,279 ratings

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#1 NEW YORK TIMES BESTSELLER

A landmark volume in science writing by one of the great minds of our time, Stephen Hawking’s book explores such profound questions as: How did the universe begin—and what made its start possible? Does time always flow forward? Is the universe unending—or are there boundaries? Are there other dimensions in space? What will happen when it all ends?

Told in language we all can understand, A Brief History of Time plunges into the exotic realms of black holes and quarks, of antimatter and “arrows of time,” of the big bang and a bigger God—where the possibilities are wondrous and unexpected. With exciting images and profound imagination, Stephen Hawking brings us closer to the ultimate secrets at the very heart of creation.

From the Publisher

Wall Street Journal says, “A masterful summary of what physicists now think the world is made of”

The New Yorker says, “Charming and lucid… A book of sunny brilliance.”

Editorial Reviews

Review

“[Hawking] can explain the complexities of cosmological physics with an engaging combination of clarity and wit. . . . His is a brain of extraordinary power.”—The New York Review of Books

“This book marries a child’s wonder to a genius’s intellect. We journey into Hawking’s universe while marvelling at his mind.”—The Sunday Times (London)

“Masterful.”—The Wall Street Journal

“Charming and lucid . . . [A book of] sunny brilliance.”—The New Yorker

“Lively and provocative . . . Mr. Hawking clearly possesses a natural teacher’s gifts—easy, good-natured humor and an ability to illustrate highly complex propositions with analogies plucked from daily life.”—The New York Times

“Even as he sits helpless in his wheelchair, his mind seems to soar ever more brilliantly across the vastness of space and time to unlock the secrets of the universe.”—Time

From the Inside Flap

A Brief History of Time, published in 1988, was a landmark volume in science writing and in world-wide acclaim and popularity, with more than 9 million copies in print globally. The original edition was on the cutting edge of what was then known about the origins and nature of the universe. But the ensuing years have seen extraordinary advances in the technology of observing both the micro- and the macrocosmic world--observations that have confirmed many of Hawking's theoretical predictions in the first edition of his book.

Now a decade later, this edition updates the chapters throughout to document those advances, and also includes an entirely new chapter on Wormholes and Time Travel and a new introduction. It make vividly clear why A Brief History of Time has transformed our view of the universe.

About the Author

Stephen Hawking was the Lucasian Professor of Mathematics at the University of Cambridge for thirty years and the recipient of numerous awards and honors including the Presidential Medal of Freedom. His books for the general reader include My Brief History, the classic A Brief History of Time, the essay collection Black Holes and Baby Universes, The Universe in a Nutshell, and, with Leonard Mlodinow, A Briefer History of Time and The Grand Design. Stephen Hawking died in 2018.

Excerpt. © Reprinted by permission. All rights reserved.

Chapter One

Our picture of the universe

A well-known scientist (some say it was Bertrand Russell) once gave a public lecture on astronomy. He described how the earth orbits around the sun and how the sun, in turn, orbits around the center of a vast collection of stars called our galaxy. At the end of the lecture, a little old lady at the back of the room got up and said: “What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.” The scientist gave a superior smile before replying, “What is the tortoise standing on?” “You’re very clever, young man, very clever,” said the old lady. “But it’s turtles all the way down!”

Most people would find the picture of our universe as an infinite tower of tortoises rather ridiculous, but why do we think we know better? What do we know about the universe, and how do we know it? Where did the universe come from, and where is it going? Did the universe have a beginning, and if so, what happened before then? What is the nature of time? Will it ever come to an end? Can we go back in time? Recent breakthroughs in physics, made possible in part by fantastic new technologies, suggest answers to some of these longstanding questions. Someday these answers may seem as obvious to us as the earth orbiting the sun–or perhaps as ridiculous as a tower of tortoises. Only time (whatever that may be) will tell.

As long ago as 340 B.C. the Greek philosopher Aristotle, in his book On the Heavens, was able to put forward two good arguments for believing that the earth was a round sphere rather than a flat plate. First, he realized that eclipses of the moon were caused by the earth coming between the sun and the moon. The earth’s shadow on the moon was always round, which would be true only if the earth was spherical. If the earth had been a flat disk, the shadow would have elongated and elliptical, unless the eclipse always occurred at a time when the sun was directly under the center of the disk. Second, the Greeks knew from their travels that the North Star appeared lower in the sky when viewed in the south than it did in more northerly regions. (Since the North Star lies over the North Pole, it appears to be directly above an observer at the North Pole, but to someone looking from the equator, it appears to lie just at the horizon. From the difference in the apparent position of the North Star in Egypt and Greece, Aristotle even quoted an estimate that the distance around the earth was 400,000 stadia. It is not known exactly what length a stadium was, but it may have been about 200 yards, which would make Aristotle’s estimate about twice the currently accepted figure. The Greeks even had a third argument that the earth must be round, for why else does one first see the sails of a ship coming over the horizon, and only later see the hull?

Aristotle thought the earth was stationary and that the sun, the moon, the planets, and the stars moved in circular orbits about the earth. He believed this because he felt, for mystical reasons, that the earth was the center of the universe, and that circular motion was the most perfect. This idea was elaborated by Ptolemy in the second century A.D. into a complete cosmological model. The earth stood at the center, surrounded by eight spheres that carried the moon, the sun, the stars, and the five planets known at the time, Mercury, Venus, Mars, Jupiter, and Saturn (Fig 1.1). The planets themselves moved on smaller circles attached to their respective spheres in order to account for their rather complicated observed paths in the sky. The outermost sphere carried the so-called fixed stars, which always stay in the same positions relative to each other but which rotate together across the sky. What lay beyond the last sphere was never made very clear, but it certainly was not part of mankind’s observable universe.

Ptolemy’s model provided a reasonably accurate system for predicting the positions of heavenly bodies in the sky. But in order to predict these positions correctly, Ptolemy had to make an assumption that the moon followed a path that sometimes brought it twice as close to the earth as at other times. And that meant that the moon ought sometimes to appear twice as big as at other times! Ptolemy recognized this flaw, but nevertheless his model was generally, although not universally, accepted. It was adopted by the Christian church as the picture of the universe that was in accordance with Scripture, for it had the great advantage that it left lots of room outside the sphere of fixed stars for heaven and hell.

A simpler model, however, was proposed in 1514 by a Polish priest, Nicholas Copernicus. (At first, perhaps for fear of being branded a heretic by his church, Copernicus circulated his model anonymously.) His idea was that the sun was stationary at the center and that the earth and the planets moved in circular orbits around the sun. Nearly a century passed before this idea was taken seriously. Then two astronomers–the German, Johannes Kepler, and the Italian, Galileo Galilei–started publicly to support the Copernican theory, despite the fact that the orbits it predicted did not quite match the ones observed. The death blow to the Aristotelian/Ptolemaic theory came in 1609. In that year, Galileo started observing the night sky with a telescope, which had just been invented. When he looked at the planet Jupiter, Galileo found that it was accompanied by several small satellites or moons that orbited around it. This implied that everything did not have to orbit directly around the earth, as Aristotle and Ptolemy had thought. (It was, of course, still possible to believe that the earth was stationary at the center of the universe and that the moons of Jupiter moved on extremely complicated paths around the earth, giving the appearance that they orbited Jupiter. However, Copernicus’s theory was much simpler.) At the same time, Johannes Kepler had modified Copernicus’s theory, suggesting that the planets moved not in circles but in ellipses (an ellipse is an elongated circle). The predictions now finally matched the observations.

As far as Kepler was concerned, elliptical orbits were merely an ad hoc hypothesis, and a rather repugnant one at that, because ellipses were clearly less perfect than circles. Having discovered almost by accident that elliptical orbits fit the observations well, he could not reconcile them with his idea that the planets were made to orbit the sun by magnetic forces. An explanation was provided only much later, in 1687, when Sir Isaac Newton published his Philosophiae Naturalis Principia Mathematica, probably the most important single work ever published in the physical sciences. In it Newton not only put forward a theory of how bodies move in space and time, but he also developed the complicated mathematics needed to analyze those motions. In addition, Newton postulated a law of universal gravitation according to which each body in the universe was attracted toward every other body by a force that was stronger the more massive the bodies and the closer they were to each other. It was this same force that caused objects to fall to the ground. (The story that Newton was inspired by an apple hitting his head is almost certainly apocryphal. All Newton himself ever said was that the idea of gravity came to him as he sat “in a contemplative mood” and “was occasioned by the fall of an apple.”) Newton went on to show that, according to his law, gravity causes the moon to move in an elliptical orbit around the earth and causes the earth and the planets to follow elliptical paths around the sun.

The Copernican model got rid of Ptolemy’s celestial spheres, and with them, the idea that the universe had a natural boundary. Since “fixed stars” did not appear to change their positions apart from a rotation across the sky caused by the earth spinning on its axis, it became natural to suppose that the fixed stars were objects like our sun but very much farther away.

Newton realized that, according to his theory of gravity, the stars should attract each other, so it seemed they could not remain essentially motionless. Would they not all fall together at some point? In a letter in 1691 to Richard Bentley, another leading thinker of his day, Newton argued that his would indeed happen if there were only a finite number of stars distributed over a finite region of space. But he reasoned that if, on the other hand, there were an infinite number of stars, distributed more or less uniformly over infinite space, this would not happen, because there would not be any central point for them to fall to.

Product details

ASIN ‏ : ‎ B004WY3D0O
Publisher ‏ : ‎ Bantam
Accessibility ‏ : ‎ Learn more
Publication date ‏ : ‎ May 4, 2011
Edition ‏ : ‎ 10th
Language ‏ : ‎ English
File size ‏ : ‎ 20.1 MB
Screen Reader ‏ : ‎ Supported
Enhanced typesetting ‏ : ‎ Enabled
X-Ray ‏ : ‎ Enabled
Word Wise ‏ : ‎ Enabled
Print length ‏ : ‎ 242 pages
ISBN-13 ‏ : ‎ 978-0553896923
Page Flip ‏ : ‎ Enabled
Lexile measure ‏ : ‎ 1290
Best Sellers Rank: #21,057 in Kindle Store (See Top 100 in Kindle Store)
- #5 in Astronomy (Kindle Store)
- #6 in Cosmology (Kindle Store)
- #6 in Cosmology (Books)
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Stephen Hawking

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Stephen Hawking's ability to make science understandable and compelling to a lay audience was established with the publication of his first book, A Brief History of Time, which has sold nearly 10 million copies in 40 languages. Hawking has authored or participated in the creation of numerous other popular science books, including The Universe in a Nutshell, A Briefer History of Time, On the Shoulders of Giants, The Illustrated On the Shoulders of Giants, and George's Secret Key to the Universe.

(Stephen William Hawking; Oxford, Reino Unido, 8 de Enero de 1942 - Cambridge, 14 de marzo de 2018) Físico teórico británico. A pesar de sus discapacidades físicas y de las progresivas limitaciones impuestas por la enfermedad degenerativa que padecía, Stephen William Hawking es probablemente el físico más conocido entre el gran público desde los tiempos de Einstein. Luchador y triunfador, a lo largo de toda su vida logró sortear la inmensidad de impedimentos que le planteó el mal de Lou Gehrig, una esclerosis lateral amiotrófica que le aquejaba desde que tenía 20 años. Hawking es, sin duda, un ejemplo particular de vitalidad y resistencia frente al infortunio del destino.

Fue miembro de la Real Sociedad de Londres, de la Academia Pontificia de las Ciencias y de la Academia Nacional de Ciencias de Estados Unidos. Fue titular de la Cátedra Lucasiana de Matemáticas (Lucasian Chair of Mathematics) de la Universidad de Cambridge desde 1979 hasta su jubilación en 2009. Entre las numerosas distinciones que le han sido concedidas, Hawking ha sido honrado con doce doctorados honoris causa y ha sido galardonado con la Orden del Imperio Británico (grado CBE) en 1982, el Premio Príncipe de Asturias de la Concordia en 1989, la Medalla Copley en 2006, la Medalla de la Libertad en 2009 y el Premio Fundación BBVA Fronteras del Conocimiento en 2015.

Alcanzó éxitos de ventas con sus trabajos divulgativos sobre Ciencia, en los que discute sobre sus propias teorías y la cosmología en general; estos incluyen A Brief History of Time, que estuvo en la lista de best-sellers del The Sunday Times británico durante 237 semanas.

La Editorial Alvi Books le dedicó, como tributo y reconocimiento, este espacio en Amazon en 2016.

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Customers find the book well-written and fascinating, with good humor throughout. They appreciate its content as a great introduction to theoretical physics, and one customer specifically mentions its clear explanation of classical relativity and quantum mechanics for laymen. The book provides an updated view of the history of the universe and includes real facts. While some customers find it very understandable, others consider it a hard read.

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Readability Enlightened content History Physics content Religion Mind Humor Ease of reading

543 customers mention "Readability"528 positive15 negative

Customers find the book well written and enjoyable, describing it as a classic.

"Still reading about 2/3 through so far. Its a great book on some of the most interesting scientific principles of our time...." Read more

"Great read, easy to digest!" Read more

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416 customers mention "Enlightened content"398 positive18 negative

Customers find the book truly fascinating and insightful, with one customer particularly appreciating the discussion on how discoveries were made.

"...as if he was lecturing to n average joe audience - nice read and very interesting...." Read more

"Very interesting. Learned a lot. But.... I still dont know about the beginning of time, about the creation of God and about the big bang theory...." Read more

"...Did give it five stars because it was interesting and absorbing up to where I stopped." Read more

"Interesting and detailed discussion of cosmology, quantum mechanics and even some religion and philosophy thrown in...." Read more

95 customers mention "History"68 positive27 negative

Customers appreciate the historical content of the book, which covers the history of physics and contains interesting stories, with one customer noting it provides an updated view of the universe's development.

"A Brief History of Time by Stephen Hawking..." Read more

"A book that does exactly what the titles says; it's a brief history of time via Hawking's perspective...." Read more

"...I should also mention that the book is out of date, which isn't its fault: it was published in 1996 and was probably very current then, but anything..." Read more

"The first half of the book is a beautiful walk through the history of physics...." Read more

59 customers mention "Physics content"59 positive0 negative

Customers appreciate the book's physics content, describing it as a great introduction to theoretical physics, with one customer highlighting its clear explanations of classical relativity and quantum mechanics for laymen.

"...The book effortlessly walks you through theories of relativity, quantum mechanics, black holes, and the Big Bang Theory, among others...." Read more

"Good book for young minds and astro physics enthusiast" Read more

"Engaging book that explains physics in a (relatively) easy to understand and comprehensive way to a lay person...." Read more

"a book that was helpful with cosmology and modern physics" Read more

45 customers mention "Religion"32 positive13 negative

Customers appreciate the book's religious content, noting that it is based on real facts and includes major religious beliefs, with one customer mentioning it provides a better understanding of the Theory of Relativity.

"...down the universe and provides a greater understanding of life, humanity, and reality." Read more

"...of complex concepts such as black holes, the big bang, and relativity...." Read more

"...A second thing that began to bug me was the gratuitous use of the word “God”, in places where it didn’t seem to belong...." Read more

"...of cosmology, quantum mechanics and even some religion and philosophy thrown in...." Read more

44 customers mention "Mind"44 positive0 negative

Customers appreciate Hawking's mind, describing him as a brilliant man and one of the greatest minds of all time.

"...example of accessible, intelligent popular science writing from a brilliant man and a great science popularizer." Read more

"Essential read from one of the greatest minds of our time!" Read more

"...education and memories, and the appreciation of a great mind and a great man!!!" Read more

"...While he clearly has brilliant mind he does not forget that some of us do not. He speaks to us all. Everyone should read this at least once." Read more

36 customers mention "Humor"36 positive0 negative

Customers appreciate the book's humor, noting its witty and lighthearted remarks.

"...It is equally enlightening as it is at times humorous...." Read more

"...was it brimming with information, it conveyed a sense of intimacy, humor, and wit unmatched by comparable works...." Read more

"Wonderfully witty with an ability to put into context many of the more difficult theories. Professor Hawking will be sorely missed." Read more

"Very complex reading,but lots of good humor." Read more

454 customers mention "Ease of reading"310 positive144 negative

Customers have mixed opinions about the book's readability, with some finding it very understandable and surprisingly easy to read, while others describe it as very hard to understand.

"...I found it easy to read, easy to understand, and very light in the information it provides...." Read more

"Easy reading except for a few word. Wondefulr man and gave so much to help us understand what our world is all about" Read more

"Stephen Hawking is a difficult read, as I knew before buying the book...." Read more

"...English users including myself would feel comfortable and find it easy to read. He doesn't use difficult words and his writing style is clear...." Read more

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I am falling in love with my life
I truly recommend this book to high school students.
Reviewed in the United States on June 11, 2017
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A Brief History of Time by Stephen Hawking is about modern physics for general readers. Its aim is not just listing some topics, but introducing modern physics by examining current scientific answers, although not complete, to fundamental questions like: Where did we come from? Why is the universe the way it is? Was there the beginning of time? Is there an ultimate theory that can explain everything? We don't have such a theory yet.

I have read the first edition when I was a high school student around 1990, and this book is the revised version (revised in 1998). Compared to the first version, there are little changes. But there is one noticeable change in his point of view on the ultimate theory. According to him, recent findings on "dualities" seem to indicate that it would not be able to express an ultimate theory in a single fundamental formation. Instead, we may have to apply different theories to different situations, but in the areas which they overlap, they must coincide.

The book has a lot of merits. Firstly, non-native English users including myself would feel comfortable and find it easy to read. He doesn't use difficult words and his writing style is clear. In the sense, he is better than other English scientific authors like R. Penrose, J. Gleick and I. Stewart. Secondly, the level of the book is well-chosen for general readers and the total page number is just less than 200 pages. If they read the book, at least, they would be able to learn more about how the universe began, how the stars have been formed, and how we have come here as the result of the evolution of the universe. More than that, the book contains interesting stories of some Nobel Prize winners in physics with their results related to the mentioned fundamental questions. This will help readers understand the 20th century's progress in physics.

Thirdly, among the physicists who have contributed in searching an ultimate theory, the author himself is distinguished. He showed that a black hole radiates light, so we can say that a black hole is not completely black. Up to the time he presented this theory, everyone believed that a black hole can only absorb everything around it, but radiates nothing. To find the ultimate theory, we have to consolidate general relativity and quantum mechanics, but the two theories are inconsistent in many cases. But Hawking skillfully applied both of them to black holes, and obtained the result. The physicist, L. Smolin regards his finding as a starting point toward the ultimate theory. That we can read a book where Hawking himself explains about his theory for general readers is thrilling.

As I mentioned above, this is my second reading of the book. When I first read the book as a high school student, it was impressive for him to explain that at the beginning of the universe, there was a singularity where the energy density is infinite, and so the law of physics including general relativity, cannot hold. But at the second reading, I found out that what Hawking really wanted to say was not that we cannot know the beginning of the universe, but that we need another theory that can explain the beginning by considering both general relativity and quantum mechanics. Actually, in the book, he introduces his "no boundary" theory which explains it without the singularity. But this theory has been neither verified nor disproved by experiments until now.

Here is my advice for a reader. Don't think that you have to understand every word and sentence. Less than 200 pages, the book contains a lot of things and the author does his best in explaining them easily. For example, its explanation about the history from the beginning of the universe to the first living things on earth is outstanding. And about time travel, its arguments are ever clear and reasonable for me. But, in a few parts, the explanations are just sketchy, so if a reader is not already an expert, he could not fully understand them. When you meet such parts, just move forward. The most important thing is to learn some things and enjoy the reading.

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Peter
Should you read this book? Heck yes.
Reviewed in the United States on October 31, 2018
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Stephen Hawking’s A Brief History of Time is undoubtedly one of the classic casual scientific texts one should read to be well aware of the world around them and how it came to be. The author, an English theoretical physicist and cosmologist, seamlessly places the reader in the shoes of a student while diving deep into the questions we have always wondered but have never had the craving to research on our own time. Beginning with the relative basics of discoveries in the past centuries, Stephen Hawking explains in great detail the logic and reasoning behind the evolution of the human understanding of the universe. After getting the base knowledge out of the way, the book quickly dives deeper and deeper into theoretical possibilities and the observations which back them up. Due to the vagueness of the topic, the author helps readers visualize and truly understand the concepts that are being discussed with similes and analogies which relate to the real, observable world and the everyday life of the audience. When talking about the steps that must be taken for a star to transition into a black hole, Stephen Hawking connects the complex series of reasoning to a simple image, helping the reader visualize the theory: “It is a bit like a balloon---there is a balance between the pressure of the air inside, which is trying to make the balloon expand, and the tension of the rubber, which is trying to make the balloon smaller” (85). As a reader, such a vivid comparison makes the discussion of “sufficient gravitational attraction” seem a whole lot simpler and manageable to wrap your head around. Moreover, the lighthearted remarks which are tossed in throughout the text keeps you entertained and encourages you to continue reading, maybe not for the theories Hawking talks about but rather for his clever jokes which connect the material which was just discussed. During his discussion of elementary particles (matter and antimatter), the author includes a lighthearted remark which more or less summarizes the material that was just discussed: “However, if you meet your antiself, don’t shake hands! You would both vanish in a great flash of light” (71). The passage before this comment became complicated and very confusing to follow, however, after reading that joke, I couldn’t help myself but to turn a few pages back and reread his theory – all of this to understand his clever remark.
Thus far, it seems like the perfect scientific book to read – it’s light, clever, and even funny at times. Yet, some parts of the text became extremely complex and impossible to follow. It didn’t help that the author expected the audience to have prior knowledge of the historical events which connect with the theories being discussed: “In fact bursts of gamma rays from space have been detected by satellites originally constructed to look for violations of the Test Ban Treaty” (115). While knowing exactly what the treaty was about is not directly necessary for a comprehension of the ideas in the book, it would undoubtedly be more helpful if a quick snippet of historical information was included in the text. The complexity of the theory’s descriptions, on the other hand, have absolutely nothing to do with the book itself. Stephen Hawking included an abundance of analogies and explained the complicated concepts of wormholes in as simple of language as possible. The issue is not with the author and the writing style – the subject itself makes it challenging to follow the ideas on the paper. If the idea of having to reread the same paragraph multiple times upsets you – A Brief History of Time is definitely not the book for you.
All in all this is an outstanding scientific text, a classic even. The depth of the material that is being discussed in a syntax which an average teenager can understand is unbelievable at times. This book will answer the questions (and raise just as many new ones) you always had about anything to do with universe topics which are never discussed with the general public So, should you read this book? Heck yes.

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Mind bending but essential
Reviewed in Canada on October 10, 2023
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Not and easy read for me. Found myself just skimming and daydreaming as many of the concepts are so profound that they wouldn't flow into my brain - I had to go back and re-read many sections. Kind of like trying to drive the ideas into my brain with a sledgehammer. What a brilliant mind Mr. Hawkings had and we are fortunate that he shared it with us. Everything in this book is just so thought provoking - from his explanations on how he developed his theories even to his reconciling Science and God. IMHO a must read for everyone.

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大録　国行
とても読みやすい。
Reviewed in Japan on June 30, 2021
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難しい内容を平易な英文で説明されていて、この先生の能力の高さに感服。何回も読んでレベルの高い英文を吸収できるような気がする。

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Daksh
Op book I hv ever read
Reviewed in India on March 6, 2023
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I liked it the most in my life

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Daksh

Op book I hv ever read

Reviewed in India on March 6, 2023
I liked it the most in my life

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vincenzo p.
Sul tempo
Reviewed in Italy on July 17, 2023
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Il libro e’ di mio particolare interesse. Non e’ detto che piaccia a tutti , pero’

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Buen libro
Reviewed in Spain on April 29, 2016
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Explicado con ejemplos para que se entienda bien. Un gran libro clasico que te deja sin palabras. Muy interesante, sin duda.

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5.0 out of 5 stars Mind bending but essential

5.0 out of 5 stars とても読みやすい。

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I truly recommend this book to high school students.

Should you read this book? Heck yes.

Mind bending but essential

とても読みやすい。

Op book I hv ever read

Sul tempo

Buen libro