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Is Pluto a Planet?
A Historical Journey through the Solar System
David A. Weintraub
With a new postscript by the author

Paperback | 2008 | $22.95 / £15.95 | ISBN: 9780691138466
280 pp. | 6 x 9 | 65 halftones. 7 line illus. 1 table.
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A Note from the Author: On August 24, 2006, at the 26th General Assembly of the International Astronomical Union (IAU) in Prague, by a majority vote of only the 424 members present, the IAU (an organization of over 10,000 members) passed a resolution defining planet in such a way as to exclude Pluto and established a new class of objects in the solar system to be called "dwarf planets," which was deliberately designed to include Pluto.

With the discovery of Eris (2003 UB313)--an outer solar system object thought to be both slightly larger than Pluto and twice as far from the Sun--astronomers have again been thrown into an age-old debate about what is and what is not a planet. One of many sizeable hunks of rock and ice in the Kuiper Belt, Eris has resisted easy classification and inspired much controversy over the definition of planethood. But, Pluto itself has been subject to controversy since its discovery in 1930, and questions over its status linger. Is it a planet? What exactly is a planet?

Is Pluto a Planet? tells the story of how the meaning of the word "planet" has changed from antiquity to the present day, as new objects in our solar system have been discovered. In lively, thoroughly accessible prose, David Weintraub provides the historical, philosophical, and astronomical background that allows us to decide for ourselves whether Pluto is indeed a planet.

The number of possible planets has ranged widely over the centuries, from five to seventeen. This book makes sense of it all--from the ancient Greeks' observation that some stars wander while others don't; to Copernicus, who made Earth a planet but rejected the Sun and the Moon; to the discoveries of comets, Uranus, Ceres, the asteroid belt, Neptune, Pluto, centaurs, the Kuiper Belt and Eris, and extrasolar planets.

Weaving the history of our thinking about planets and cosmology into a single, remarkable story, Is Pluto a Planet? is for all those who seek a fuller understanding of the science surrounding both Pluto and the provocative recent discoveries in our outer solar system.

Review:

"David Weintraub sets the debate in its full context, and his views will be of interest to anyone who wants to know how our view of the universe around us has changed over time."--Martin Ince, Times Higher Education Supplement

"Vanderbilt astronomer Weintraub places the Pluto controversy in context in his judicious, lively account of the development of our solar system and the evolution of the meaning of the word planet. . . . Weintraub effectively shows that Pluto is a planet by most definitions, but so are several other objects in the Kuiper asteroid belt. Weintraub's provocative, engaging study points to the richness and complexity of our solar system and its many possible planets."--Publishers Weekly

"Well told. . . . "Is Pluto a Planet?" . . . provides a readable historical account of our knowledge of the Solar System and the concept of what has been considered to be a planet. . . . Towards the end of this interesting book, Weintraub surprisingly concludes, despite the close analogy between the discovery of the asteroid and Kuiper belts, that we should retain Pluto as a planet by using three physical parameters of orbital characteristics, mass and roundness."--Stuart Ross Taylor, Nature

"Weintraub discusses how the concept of planet has changed. He describes the rises and falls in the number of planets recognized in our solar system--changes that lead him to term Pluto 'the fourth ninth planet.' Although readers may not accept Weintraub's answer to the titular question, they will find his thought-provoking account provides ample information for supporting a variety of positions in the continuing debate."--Science

"A fascinating, accessible, and eminently readable historical introduction to the development of the planetary ideal."--David W. Hughes, Observatory

More reviews

Table of Contents:

PREFACE ix
Chapter 1: What Is a Planet? 1
Chapter 2: Seven Perfect Planets Made of Aether 6
Chapter 3: The Earth Becomes a Planet 36
Chapter 4: Sixteen Planets 59
Chapter 5: Not Everything That Orbits the Sun Is a Planet 71
Chapter 6: Uranus! 82
Chapter 7: The Celestial Police 95
Chapter 8: Neptune, the Thirteenth Planet 107
Chapter 9: Easy Come, Easy Go 121
Chapter 10: Pluto, the Fourth Ninth Planet 130
Chapter 11: Hidden Secrets of the Outer Solar System 148
Chapter 12: The Plutinos 167
Chapter 13: Is Pluto a Planet? 179
Chapter 14: Goldilocks 185
POSTSCRIPT: Current Thoughts by Other Astronomers 222
APPENDIX: What We Know about Pluto 232
NOTES 243
INDEX 249

Another Princeton book authored or coauthored by David A. Weintraub:

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    File created: 4/17/2014

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