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NearEarth Objects: Finding Them Before They Find Us,New
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An insider's look at the science of nearEarth comets and asteroidsOf all the natural disasters that could befall us, only an Earth impact by a large comet or asteroid has the potential to end civilization in a single blow. Yet these nearEarth objects also offer tantalizing clues to our solar system's origins, and someday could even serve as steppingstones for space exploration. In this book, Donald Yeomans introduces readers to the science of nearEarth objectsits history, applications, and ongoing quest to find nearEarth objects before they find us.In its course around the sun, the Earth passes through a veritable shooting gallery of millions of nearby comets and asteroids. One such asteroid is thought to have plunged into our planet sixtyfive million years ago, triggering a global catastrophe that killed off the dinosaurs. Yeomans provides an uptodate and accessible guide for understanding the threats posed by nearEarth objects, and also explains how early collisions with them delivered the ingredients that made life on Earth possible. He shows how later impacts spurred evolution, allowing only the most adaptable species to thrivein fact, we humans may owe our very existence to objects that struck our planet.Yeomans takes readers behind the scenes of today's efforts to find, track, and study nearEarth objects. He shows how the same comets and asteroids most likely to collide with us could also be mined for precious natural resources like water and oxygen, and used as watering holes and fueling stations for expeditions to Mars and the outermost reaches of our solar system.
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