Titlebook: Comet/Asteroid Impacts and Human Society; An Interdisciplinary Peter T. Bobrowsky,Hans Rickman Book 2007 Springer-Verlag Berlin Heidelberg

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The Impact Hazard: Advanced NEO Surveys and Societal Responsesthe past decade. The first comprehensive modern analysis of the impact hazard resulted from a NASA study requested by the United States Congress. This . (.) provided a quantitative estimate of the impact hazard as a function of impactor size (or energy) and advocated a strategy to deal with such a t

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Evaluating the Risk of Impacts and the Efficiency of Risk Reductionust particles up to planetary bodies. In fact, a clue to the importance of this phenomenon also for our planet has always been available on the heavily cratered surface of the Moon, that testifies to the present and past fluxes of bodies on Earth crossing orbits.

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Physical Effects of Comet and Asteroid Impacts: Beyond the Crater Rimety of solid solar system debris. Most of this debris is so small that it evaporates harmlessly, as it enters the Earth’s upper atmosphere at high speed. However, an occasional larger object survives atmosphere entry. Small examples of such objects result in meteorites on the surface of the Earth, w

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Frequent Ozone Depletion Resulting from Impacts of Asteroids and Cometsting occurred at the end of the Cretaceous, approximately 66 million years ago. The postulate introduced in 1980 by Alvarez et al. (1980) that the collision of an approximately 10 km diameter asteroid with the Earth caused the extinction of the dinosaurs along with more than half of all plant and an

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The Physical and Social Effects of the Kaali Meteorite Impact — a Review.; .). We are aware that rare large impacts have changed the face of our planet as reflected by extinctions at the Permian/Triassic (～251 Ma; .), Triassic/Jurassic (～200 Ma; .) and Cretaceous/Tertiary (～65 Ma; .) boundaries. Today astronomers can detect and predict the orbits of the asteroids/comets