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Look Inside. May 03, Minutes Buy. What is the source of order in our universe? And what cosmic future awaits us? Intellectually thrilling and widely accessible, Cycles of Time is a welcome new contribution to our understanding of the universe from one of our greatest mathematicians and thinkers. What is its ultimate future? Current understanding of our universe dictates that all matter will eventually thin out to zero density, with huge black holes finally evaporating away into massless energy. Along the way to this remarkable cosmological picture, Penrose sheds new light on basic principles that underlie the behavior of our universe, describing various standard and nonstandard cosmological models, the fundamental role of the cosmic microwave background, and the key status of black holes. Ideal for both the amateur astronomer and the advanced physicist—with plenty of exciting insights for each— Cycles of Time is certain to provoke and challenge. Intellectually thrilling and accessible, this is another essential guide to the universe from one of our preeminent thinkers. He has received numerous prizes and awards, most notably the Wolf Foundation Prize in physics, which he shared with Stephen Hawking. He is the author of… More about Roger Penrose. Deeply enlightening. There is, however, a very strong scientific case for expanding the boundaries of our thinking. But like all steep slopes, sometimes you take a moment from your struggles and look up, and in front of you is an utterly gorgeous view. This fascinating book will surely become a classic in the history of cosmology. The best thing to do is to take a deep breath, grab a copy of this fascinating book, and plunge right Cycles of Time: An Extraordinary New View of the Universe. Penrose is at his best when he explains this deep and beautiful mystery, and the book may be Cycles of Time: An Extraordinary New View of the Universe reading for this chapter alone. When you buy a book, we donate a book. Sign in. Read An Excerpt. May 01, ISBN Add to Cart. Also available from:. Sep 06, ISBN Available from:. Audiobook Download. Paperback —. Also by Roger Penrose. Product Details. Inspired by Your Browsing History. The Stars. The Beginning of Infinity. David Deutsch. Black Hole Survival Guide. Time Travel. James Gleick. Programming the Universe. The Theory of Almost Everything. Robert Oerter. The Dialogues. Clifford V. Would You Baptize an Extraterrestrial? The Fabric of Reality. The Accidental Universe. Alan Lightman. The Practical Astronomer, 2nd Edition. Anton Vamplew. Searching for Stars on an Island in Maine. The Road to Reality. Roger Penrose. The Big Bang Never Happened. Michael Brooks. The Hunt for Zero Point. The Universe in the Rearview Mirror. Dave Goldberg. Beyond Earth. Amanda R. Hendrix, Ph. Celestial Calculations. Black Holes. Stephen Hawking. Who Built the Moon? Alan Butler and Christopher Knight. Leonard Mlodinow. Light from the Void. Kimberly K. ArcandMartin C. WeisskopfGrant TremblayBelinda J. WilkesMegan Watzke and Martin C. The Great Unknown. Marcus du Sautoy. Paul V. Pancella and Marc Humphrey. The Ascension Mysteries. David Wilcock. The Character of Physical Law, with new foreword. Cycles of Time: An Extraordinary New View of the Universe Feynman. Related Articles. Looking for More Great Reads? Download Hi Res. LitFlash The eBooks you want at the lowest prices. Read it Forward Read it first. Pass it on! Stay in Touch Sign up. We are experiencing technical difficulties. Please try again later. Become a Member Start earning points for buying books! a book review by Graham Storrs: Cycles of Time: An Extraordinary New View of the Universe

His work with Stephen Hawking on black holes is almost as famous as his purely mathematical contributions in the field of tiling, yet his contributions to science go well beyond these highlights. So when he writes a book subtitled An Extraordinary New View of the Universeanyone who is interested in the world, how it works, and how it got here will consider picking it up. And he really does present a quite extraordinary hypothesis. The universe, he says, is cycling repeatedly from one big bang to another. It bursts into existence in a very special state of uniformity and extremely low entropy, expands in ways consistent with the Second Law of Thermodynamics which means entropy is constantly increasing—mostly through the production of black holesand this expansion accelerates to infinity, over a period of at least years, as the black holes evaporate away Cycles of Time: An Extraordinary New View of the Universe even the rest mass of electrons and positrons fade to nothing. Usually popular science books written for the layperson introduce us to established science or summarize a new field. They avoid complex mathematics as much as possible, and they take their time over the more difficult ideas, often repeating the same material in slightly different ways to help the layperson fumble their way through the arguments. Cycles of Time is not that kind of book. It is a difficult read and tackles extremely deep and complicated matters. Repetition is almost completely avoided, replaced with references back to where the material was first introduced or discussed. Although the reader is spared the worst of the mathematics which is, nevertheless, presented in a set of appendices there is enough in the text to cause most laypersons work hard to follow it; and the physical concepts presented are not for the fainthearted. Yet it is worth the work. Penrose is a clear and articulate writer. Even his academic papers are a marvel of lucidity. And degrees in math and physics would probably help, too. Why is it worth the work? Well, there are great insights to be had here into the nature of entropy, the Second Law of Thermodynamics, and their relationship to the big bang and to black holes. Even though Dr. Penrose makes some assumptions which, even to a layperson seem suspect for example, that the mass of the electron and positron will fade away given enough time, and that information loss in black holes can Cycles of Time: An Extraordinary New View of the Universe re-stated as a loss of degrees of freedom as the singularity consumes particles he also makes predictions, at least one of which concentric anisotropies in the cosmic microwave background—CMB—due to gravity waves from pre-big bang black hole interactions has been tested and found to exist in the data. Many physicists argue that these circles in the CMB are statistical artifacts or that they are the result of colliding universes in a very different kind of multiverse. Yet the fact remains that they support Dr. Probably the best thing to do is to take a deep breath, grab a copy of this fascinating book, Cycles of Time: An Extraordinary New View of the Universe plunge right in. Graham Storrs is a former research scientist and software designer who now writes science fiction. He is the author of TimeSplasha near-future sci-fi thriller Lyrical Press. Enter your keywords. Author s :. Roger Penrose. Release Date:. April 30, Buy on Amazon. Reviewed by:. Graham Storrs. Cycles of Time by Roger Penrose: | : Books

The book outlines Penrose's Conformal Cyclic Cosmology CCC model, which is an extension of general relativity but opposed to the widely supported multidimensional string theories and cosmological inflation following the Big Bang. Penrose examines Cycles of Time: An Extraordinary New View of the Universe of the Second Law of Thermodynamics and its inevitable march toward a maximum entropy state of the universe. Penrose illustrates entropy in terms of information state phase space with 1 dimension for every degree of freedom where particles end up moving through ever larger grains of this phase space from smaller grains over time due to random motion. He disagrees with Stephen Hawking 's back-track [1] over whether information is destroyed when matter enters black holes. Such information loss would non-trivially lower total entropy in the universe as the black holes wither away due to Hawking radiationresulting in a loss in phase space degrees of freedom. This period from Big Bang to infinite expansion Penrose defines as an aeon. Conformal geometry preserves the angles but not the distances of the previous aeon, allowing the new aeon universe to appear quite small at its inception as its phase space starts anew. Penrose cites concentric rings found in the WMAP cosmic microwave background survey as preliminary evidence for his model, as he predicted black hole collisions from the previous aeon would leave such structures due to ripples of gravitational waves. Most nonexpert critics nonscientists have found the book a challenge to fully comprehend; a few such as Kirkus Reviews [2] and Doug Johnstone for The Scotsman [3] appreciate the against the grain innovative ideas Penrose puts forth. Escher "would have approved". That said, the second half of Cycles of Time offers some seriously hard sledding"; "If you'll forgive a skiing metaphor, Cycles of Time is a black diamond of a book. From Wikipedia, the free encyclopedia. Physical Review D. Bibcode : PhRvD. Cycles of Time: An Extraordinary New View of the Universe Reviews. The Scotsman. Retrieved 26 May The Guardian. Retrieved 27 May New York Journal of Books. The Boston Globe. Archived from the original on 10 June Retrieved 15 April Roger Penrose. Aldiss Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. Add links. Bodley Head 1st edition front cover. Science, Mathematics, CosmologyPhysics. The Road to Reality.