Free PDF Black Holes; A Traveler's Guide, by Clifford A. Pickover
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Black Holes; A Traveler's Guide, by Clifford A. Pickover
Free PDF Black Holes; A Traveler's Guide, by Clifford A. Pickover
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- Sales Rank: #8702899 in Books
- Published on: 1996
- Binding: Paperback
Most helpful customer reviews
0 of 0 people found the following review helpful.
Attempts for middle ground - Hurray! - though flawed
By Daniel Caldwell
Mixed.
Thank goodness Pickover had the guts to write a book about black holes and include some equations! The theory of black holes is inherently mathematical, so it is very welcome to read a book that tries to bridge the gap between popularization in words only versus full-on mathematical physics.
But you'll have to be patient, not only to work through the math, but to put up with flaws that an editor should have fixed. On p. 56, Pickover offers two equations, and tries to help the reader feel comfortable with them, despite their apparent complexity. But, if you get out a pencil and simplify the algebra, each equation actually reduces to something much simpler. Unfortunately, the first equation reduces all the way to z = r. That can't be right, because the equation is supposed to describe a circle. In the end, I learned something by doing the math to find the problem. I am half grateful, but half scornful.
As others have pointed out, Pickover mixes mathematical directness - actually showing equations - with behind-the-back "simplifications", such as changing to non-standard units. In another example, Pickover describes a rotating black hole as "lemon-shaped", then in the notes, he says the black hole isn't lemon-shaped, but he since couldn't think of a fruit that was hamburger-shaped, he just went with lemon. If you're not on your toes, the simplifications can confuse you more than the math itself.
Similarly, Pickover's gimmick to lighten up the presentation by featuring you as a space captain ordering about your underling is awkward to the point of grating, but at least he tried.
I'd have to say this book was not really ready to publish, but I am getting a lot out of it that I can't find in other books, despite the substantial flaws.
13 of 13 people found the following review helpful.
GET THE BOOK AND BEGIN YOUR OWN TRAVEL!
By Reinaldo Olivares
For over five years I've been a fond of classic physics, cuantic physics, cosmology and astrophysics. I've read the books of some of the greatest writers of these branches of science, among which I remember Stephen Hawking, Paul Davies, Roger Penrose, Albert Einstein, etc. All of these books are very complete if we talk about the information exposed by them, but they have a common characteristic (I don't know whether is a defect in fact), is highly recommendable to have a certain level of scientific knowledge in order to make good use of its content. The book featured by Clifford A. Pickover "Black Holes: A traveler's guide" is totally different to those that I've read before. Is a complete, funny and, overcoat, is easily understandable by anybody. At the beginning of each chapter there are presented dialogs (between the reader and an alien called Mr. Plex) with the purpose of giving the main idea of what is coming up next. In the same way, almost all chapters make reference to simple formulas that describe the most relevant aspects about the behavior of black holes. Besides the main subject (black holes), the author took charge of showing in a briefly manner another "not less important" subjects of astrophysics and cosmology. I had never understood many of the formulas presented until I read this book. When you begin to read it, you begin a journey to the marvelous structure of one of the strangest and most fascinating things in the whole universe, a black hole. Is the best book that I've ever seen about this topics and I believe that somebody difficultly overcome the clear, precise and funny style of writing of Clifford A. Pickover. GET THE BOOK AND BEGIN YOUR OWN TRAVEL!
15 of 16 people found the following review helpful.
Happy trails....
By D. Roberts
The term "black hole" was coined by the Princeton physicist John Archibald Wheeler. What, exactly, a black hole is (if there even is such a thing) has been a source of debate and confusion for decades. Clifford Pickover inserts you as the main character of this book. You are on a spaceship (complete with aliens) way the heck in the future & your ship is near a black hole. So, you & your friends decide to do a close (literally) study of the cosmic anomaly.
The story is entertaining & has many didactic features. Pickover also inserts some humor so as to make the book enjoyable as opposed to a dense treatise of rather complex mathematical concepts. Also, at the end of each chapter is a section called "The science behind the science fiction." It is a detailed account of what we presently know (or think we know) about the notions which were presented in the narrative.
And, the concepts are many. We learn of various weird things that happen in & near a black hole, such as time slowing, the "shrinking" of one's perspective due to the singularity & the mind-numbing gravitational power which is projected by black holes.....a gravity field so immense that the escape velocity exceeds light speed. We learn how black holes were predicted by Einstein's theory of Relativity as well as how the many principles of quantum mechanics come into the picture when one is attempting to understand the nature of singularities.
Much of this book is speculation, but it is educated speculation. The conjectures on what happens inside of a singularity, as well as the possiblity of wormholes which lead to other universes & dimensions is exciting & based on our best available current knowledge of the cosmos. As an added bonus, there is a chapter in the back of the book in which many of the world's leading cosmologists answer questions posed by the author on various topics about & related to black holes. There are also computer animation pictures of some of the more dazzling geometrical effects that are generated by black holes. For anyone who is planning to visit a black hole anytime soon, this book is a must.
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