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English
Oxford University Press
29 August 2017
The cycle of day and night and the cycle of seasons are two familiar natural cycles around which many human activities are organized. But is there a third natural cycle of importance for us humans? On 13 March 1989, six million people in Canada went without electricity for many hours: a large explosion on the sun was discovered as the cause of this blackout. Such explosions occur above sunspots, dark features on the surface of the Sun that have been observed through telescopes since the time of Galileo.

The number of sunspots has been found to wax and wane over a period of 11 years. Although this cycle was discovered less than two centuries ago, it is becoming increasingly important for us as human society becomes more dependent on technology. For nearly a century after its discovery, the cause of the sunspot cycle remained completely shrouded in mystery. The 1908 discovery of strong magnetic fields in sunspots made it clear that the 11-year cycle is the magnetic cycle of the sun. It is only during the last few decades that major developments in plasma physics have at last given us the clue to the origins of the cycle and how the large explosions affecting the earth arise.

Nature's Third Cycle discusses the fascinating science behind the sunspot cycle, and gives an insider's perspective of this cutting-edge scientific research from one of the leaders of the field.

By:  
Imprint:   Oxford University Press
Country of Publication:   United Kingdom
Dimensions:   Height: 222mm,  Width: 149mm,  Spine: 15mm
Weight:   412g
ISBN:   9780198807643
ISBN 10:   0198807643
Pages:   296
Publication Date:  
Audience:   General/trade ,  ELT Advanced
Format:   Paperback
Publisher's Status:   Active
Nigel Weiss: Foreword Preface 1: Explosions, blackouts and cycles 2: The mysterious sunspots 3: Here comes the sun 4: The fourth state of matter 5: Floating magnetic buoys 6: Dynamos in the sky 7: The conveyor belt inside the sun 8: A journey from the sun to the earth 9: Gazing into the crystal ball 10: Epilogue: Dynamos are forever Appendix: Technical details of some important topics

Arnab Rai Choudhuri is a Professor of Physics at the Indian Institute of Science. He received his PhD in 1985 from the University of Chicago under the supervision of Eugene Parker, usually regarded as the most influential solar physicist of our time. Choudhuri has carried on theoretical research on the formation of sunspots and the 11-year sunspot cycle. He was one of the originators of the flux transport dynamo model, the currently favoured theoretical model of the 11-year sunspot cycle. He is the author of two advanced textbooks, The Physics of Fluids and Plasmas (CUP, 1998) and Astrophysics for Physicists (CUP, 2010), used in many universities around the world.

Reviews for Nature's Third Cycle: A Story of Sunspots

"""Choudhuri gives us a condensed history of the study of the sun and of sunspots over the past few centuries back to Galileo Gailiei, whose discovery of the Sun's 27-day rotation marked the serious start of solar physics... The remarkable tale includes skilled amateurs as well as professional academics, the rivalries between the main players, and a probable husband-wife murder-suicide thrown into the mix. Yes, there is a lot in the story of studying the sun, and the author does a masterful job of making it a fascinating read."" -- Simon Constable, Forbes ""A fascinating, engaging and enjoyable book."" -- Contemporary Physics ""This captivating book immerses the readers in the development of solar physics as though they were participating in a theatre play. Many personal memories provide fascinating links to the historical development of solar science. It is a book hard to put down once started!"" -- Pascal Demoulin, Observatoire de Paris ""Going through Nature's Third Cycle - A Story of Sunspots by Arnab Rai Choudhuri is equivalent to having a ringside view of the gradual unveiling of one of the abiding mysteries associated with the Sun ... In the academic community, Rai Choudhuri is known as a wonderful teacher and a brilliant scientist. He uses his expertise as a teacher to take the readers effortlessly through the complexities of solar physics."" -- Sushan Konar, Resonance ""This [book] establishes new (unprecedentedly high) standards of scientific writing ... Already in the beginning, the reviewer has to tell that this book is among the best he has ever taken in his hands ... It should be stressed that reading this book will be easy for geoscientists ... [and] will attract more young people to science."" -- Dmitry A. Ruban, Zentralblatt fuer Geologie und Palaeontologie"


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