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This book was first published in 2007. Variable stars are those that change brightness. Their variability may be due to geometric processes such as rotation, or eclipse by a companion star, or physical processes such as vibration, flares, or cataclysmic explosions. In each case, variable stars provide unique information about the properties of stars, and the processes that go on within them. This book provides a concise overview of variable stars, including a historical perspective, an introduction to stars in general, the techniques for discovering and studying variable stars, and a description of the main types of variable stars. It ends with short reflections about the connection between the study of variable stars, and research, education, amateur astronomy, and public interest in astronomy. This book is intended for anyone with some background knowledge of astronomy, but is especially suitable for undergraduate students and experienced amateur astronomers who can contribute to our understanding of these important stars.

Variable stars. --- Astronomy. --- Stars, Variable --- Variables (Stars) --- Stars

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Stars --- 524.33 --- Variable stars --- Stars, Variable --- Variables (Stars) --- Variable stars. --- 524.33 Variable stars

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Variable stars --- 524.33 --- 524.33 Variable stars --- Stars, Variable --- Variables (Stars) --- Stars

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Founded in 1911, the AAVSO boasts over 1200 members and observers and is the world's largest non-profit organization dedicated to variable star observation. This timely book marks the AAVSO's centennial year, presenting an authoritative and accurate history of this important association. Writing in an engaging and accessible style, the authors move chronologically through five eras of the AAVSO, discussing the evolution of its structure and purpose. Throughout the text, the main focus is on the thousands of individuals whose contributions have made the AAVSO's progress possible. Describing a century of interaction between amateur and professional astronomers, the authors celebrate the collaborative relationships that have existed over the years. As the definitive history of the first hundred years of the AAVSO, this text has broad appeal and will be of interest to amateur and professional astronomers, as well as historians and sociologists of science in general.

Astronomy --- Variable stars --- Stars, Variable --- Variables (Stars) --- Stars --- Observations --- History. --- American Association of Variable Star Observers. --- AAVSO

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524.33 --- Nebulae --- Variable stars --- Stars, Variable --- Variables (Stars) --- Stars --- Galactic nebulae --- Gaseous nebulae --- Nebulas --- Galaxies --- Nebulae. --- Variable stars. --- 524.33 Variable stars