Nature's Third Cycle
A Story of Sunspots
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A termék adatai:
- Kiadó OUP Oxford
- Megjelenés dátuma 2015. január 29.
- ISBN 9780199674756
- Kötéstípus Keménykötés
- Terjedelem294 oldal
- Méret 226x141x20 mm
- Súly 526 g
- Nyelv angol
- Illusztrációk 78 b/w illustrations 0
Kategóriák
Rövid leírás:
The 11-year cycle of sunspots is one of the most intriguing natural cycles known to mankind. This book explores the fascinating science behind these phenomena and gives an insider's view of the history of the field.
TöbbHosszú leírás:
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.
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.
Tartalomjegyzék:
Foreword
Preface
Explosions, blackouts and cycles
The mysterious sunspots
Here comes the sun
The fourth state of matter
Floating magnetic buoys
Dynamos in the sky
The conveyor belt inside the sun
A journey from the sun to the earth
Gazing into the crystal ball
Epilogue: Dynamos are forever
Appendix: Technical details of some important topics
