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Black Holes, Wormholes, and Time Machines (Anglais) Broché – 12 décembre 2011

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Couverture | Copyright | Table des matières | Extrait | Index | Quatrième de couverture
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Commentaires client les plus utiles sur (beta) 6 commentaires
5 internautes sur 6 ont trouvé ce commentaire utile 
Black Holes, Wormholes and Time Machines 1 février 2013
Par George Joannou - Publié sur
Format: Format Kindle Achat vérifié
I believe this book was written for the intelligent layman who wishes to know about the fascinating subject of black holes, wormholes and the possibility of time travel past and future. There are no mathematical formulas used and despite this the author still manages to clearly explain the subject matter . I thoroughly enjoyed reading this book, I didn't want to put it down.I read the entire book in two sittings.
1 internautes sur 1 ont trouvé ce commentaire utile 
Best book on these topics for an intermediate level reader. 7 avril 2014
Par mannyfresh - Publié sur
Format: Broché
This is the best book I have read on these topics. It is not so basic that it is boring or so jargon'y/mathematical that you can't comprehend. It is just the right level for those interested in these topics that keeps you engaged and wanting to learn more. The author's passion for these topics is very noticeable, which keeps you hooked.

I highly recommend this one.
Fascinating and Highly Readable Look into Cosmological Thought 22 juin 2014
Par J. Groen - Publié sur
Format: Broché Achat vérifié
This book is a fascinating and highly readable look into cosmological thought. It is full of interesting concepts and well worth the cost of money and time to delve into. One concept that the book covered well was the fact that time slows down as an individual travels faster. Although other books have covered this concept, the examples that this book used made the concept real and much more understandable.

Personally, I especially liked the chapters on wormholes. Although other books that I have read recently have covered these concepts, this one, using the recent book Contact (starring Jodie Foster and made in 1997) gave some reality to how this would work.

I highly recommend this book for any interested in astronomy and the universe.
A background in physics is a must in order to understand this book, in spite of Al-Khalili's assurances 16 juin 2014
Par Craig Rowland - Publié sur
Format: Broché
Jim Al-Khalili stated several times throughout the introduction to Black Holes, Wormholes, and Time Machines that he wrote the book for those with no prior background in science. He was going to talk about some pretty heavy stuff, like the theory of relativity, but would make it all easy to understand and with even a bit of humour thrown in. As a prime target for a book like this, I started the book twelve days ago hoping to be enlightened about the origin of the universe and all its quirky inhabitants like black holes, wormholes, pulsars, neutron stars and so on. That it took me a good twelve days to get through these 178 pages should tell you something: the basic science I felt was very early overshadowed by talk far too technical for me to grasp.

Granted, this book is classified within the physics range, and I admit to knowing far less about physics than about astronomy. The title and the cover however might lead one to expect that its main focus was either astronomy or cosmology. Al-Khalili did do a good job explaining the differences between these two space sciences. Yet I still felt utterly in the dark most times when he attempted to discuss some law of physics; Einstein's theory of relativity, the theory of special relativity, or string theory all were lost on me. I felt that the only way I might have been able to understand these theories of physics in an astronomical context would be to provide the book with an accompanying DVD. I never seem to feel so lost when I watch TV shows about such concepts. Television graphics and special effects enhance the theories, while a two-dimensional page detracts from them. Al-Khalili did however include some diagrams which I appreciated.

Al-Khalili answered many questions that I myself have pondered over, including "If the Universe is expanding, but at the same time contains the whole of space, what does it expand into?" and "What is there beyond the edge of the Universe?". The answers to these questions I did find easier to understand, and even fascinating. The concept of the beginning and the end of time will also leave you in awe, so I give Al-Khalili credit for these particular carefully thought-out explanations.

However as the book progressed, and we travelled into fourth dimensions and curved spacetime, where we propped up wormholes with "exotic" material and visited the past, I was totally lost. This was far too deep for a physics newbie, so after the first ten days where I crept through this book at a molasses rate, I just accepted whatever the author said in order to get myself closer to the end already. In spite of the initial wonderment I felt at learning some secrets of the universe, this book was an unpleasant chore to get through. Al-Khalili did try to keep the mood light throughout the entire book, dropping jokes and funny personal stories, which unfortunately didn't seem to make the physics any easier to grasp.

This is the second edition of Black Holes, Wormholes, and Time Machines and it could have used an editor. The most common errors were sentences with two different conjugated verbs, as though his initial thought was to write the verb in the present progressive, but then opted for the more simple form while still leaving the form of "to be" in the sentence.

I do not feel that the author succeeded in trying to explain black holes, wormholes, time machines and a universe of other mysterious objects to those like myself with no prior background in physics. While Al-Khalili had a noble objective for readers such as myself, I would have found this book an easier read if I had already had a firm knowledge of physics.
Not what you would expect from a science related book 17 mars 2014
Par Lina tran - Publié sur
Format: Broché Achat vérifié
The book is far from boring! I love the author's take on how he describd the aspects of such in this universe! I'm glad this was a requirement for my cosmology class or else I would have missed out. After reading the first chapter, I was stuck. I wanted to keep flipping and flipping. It's definitely a good read. And a little mind tripping.

The condition was perfect. No writings, brand new. And with the trial of amazon prime because I am a college student, the book arrived home pretty soon.
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