Of Time

Copyrighted Material

Cycles of Time

Cycles of Time

An Extraordinary New View of the Universe

ROGER PENROSE

THE BODLEY HEAD LONDON

Published by The Bodley Head 2010

Copyright © Roger Penrose 2010

Roger Penrose has asserted his right under the Copyright, Designs and Patents Act 1988 to be identified as the author of this work

This book is sold subject to the condition that it shall not, by way of trade or otherwise, be lent, resold, hired out, or otherwise circulated without the publisher's prior consent in any form of binding or cover other than that in which it is published and without a similar condition, including this condition, being imposed on the subsequent purchaser.

First published in Great Britain in 2010 by

The Bodley Head Random House, 20 Vauxhall Bridge Road, London SW1V 2SA

www.bodleyhead.co.uk www.rbooks.co.uk

Addresses for companies within The Random House Group Limited can be found at: www.randomhouse.co.uk/offices.htm

The Random House Group Limited Reg. No. 954009

A CIP catalogue record for this book is available from the British Library

The Random House Group Limited supports The Forest Stewardship Council (FSC), the leading international forest certification organisation. All our titles that are printed on Greenpeace approved FSC certified paper carry the FSC logo. Our paper procurement policy can be found at www.rbooks.co.uk/environment

Typeset by Palimpsest Book Production Limited, Falkirk, Stirlingshire Printed and bound in Great Britain by

Clays Ltd, St Ives PLC

ISBN 9780224080361

Mixed Sources

Product group from well-managed forests and other controlled sources www.fsc.org Cert no. TT-COC-2139

© 1996 Forest Stewardship Council

Roger Penrose's groundbreaking and bestselling The Road to Reality (2005) provided a comprehensive yet readable guide to our understanding of the laws that are currently believed to govern our universe. In Cycles of Time, he moves far beyond this to develop a completely new perspective on cosmology, providing a quite unexpected answer to the often-asked question 'What came before the Big Bang?'

The two key ideas underlying this novel proposal are a penetrating analysis of the Second Law of thermodynamics—according to which the 'randomness' of our world is continually increasing—and a thorough examination of the light-cone geometry of space-time. Penrose is able to combine these two central themes to show how the expected ultimate fate of our accelerating, expanding universe can actually be reinterpreted as the 'big bang' of a new one.

On the way, many other basic ingredients are presented, and their roles discussed in detail, though without any complex mathematical formulae (these all being banished to the appendices). Various standard and nonstandard cosmological models are presented, as is the fundamental and ubiquitous role of the cosmic microwave background. Also crucial to the discussion are the huge black holes lying in galactic centres, and their eventual disappearance via the mysterious process of Hawking evaporation.

0 0

Post a comment