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Product Description This book presents the most recent research on the development of a reliable defense against objects that can potentially collide with the Earth. Large asteroids and comets can collide with the Earth causing severe consequences, and collisions are a random process that can occur at any time. To reduce the threat, it is necessary to understand these potentially hazardous objects. Review "The book is an excellent compendium of current knowledge of near-Earth objects." EOS-Transactions, AGU Book Description This book presents the most recent thinking on the development of a reliable defence against objects that could potentially collide with the Earth. Large asteroids and comets can collide with the Earth with severe consequences and collisions are a random process that could occur at any time. To reduce the threat, it is necessary to understand the orbital motions of potentially hazardous objects, probe their structural and compositional nature to a high level of detail, and measure how they respond to the application of large amounts of energy or momentum. About the Author Donald Yeomans manages NASA's Near-Earth Object Program Office and JPL's Solar System Dynamics Group at the Jet Propulsion Laboratory of the California Institute of Technology, Pasadena, California.