Comet and Asteroid Impact Hazards on a Populated Earth - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Comet and Asteroid Impact Hazards on a Populated Earth write by John S. Lewis. This book was released on 2000. Comet and Asteroid Impact Hazards on a Populated Earth available in PDF, EPUB and Kindle. Disk contains: HAZARDS version 5.5, designed to predict asteroid or comet impacts with the Earth.
Hazards Due to Comets and Asteroids
Hazards Due to Comets and Asteroids - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Hazards Due to Comets and Asteroids write by Tom Gehrels. This book was released on 2021-11-30. Hazards Due to Comets and Asteroids available in PDF, EPUB and Kindle. In 1993, the U.S. Department of Defense declassified information dealing with frequent explosions in the upper atmosphere caused by meteoric impact. It is estimated that impacts have occurred of a magnitude equivalent to the atomic bomb detonated at Hiroshima. Not all such space voyagers meet their end in the atmosphere, however; huge craters attest to the bombardment of earth over millions of years, and a major impact may have resulted in the extinction of dinosaurs. An impact in Siberia near the beginning of this century proves that such events are not confined to geologic time. Hazards Due to Comets and Asteroids marks a significant step in the attempt to come to grips with the threats posed by such phenomena. It brings together more than one hundred scientists from around the world, who draw on observational and theoretical research to focus on the technical problems related to all aspects of dealing with these hazards: searching for and identifying hazardous comets and asteroids; describing their statistics and characteristics; intercepting and altering the orbits of dangerous objects; and applying existent technologies—rocket boosters, rendezvous and soft-landing techniques, instrumentation—to such missions. The book considers defensive options for diverting or disrupting an approaching body, including solar sails, kinetic-energy impacts, nuclear explosives, robotic mass drivers, and various propulsion systems. A cataclysmic impact posing a threat to life on Earth is a possibility that tomorrow's technology is capable of averting. This book examines in depth the reality of the threat and proposes practical measures that can be initiated now should we ever need to deal with it.
Asteroid Impact Risk
Asteroid Impact Risk - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Asteroid Impact Risk write by Josep M. Trigo-Rodríguez. This book was released on 2022-03-08. Asteroid Impact Risk available in PDF, EPUB and Kindle. This book describes the complexity of impact hazards associated with asteroids and comets. The challenge in this regard lies in the heterogeneous nature of these bodies that endanger our planet, which is why we are conducting new experiments to better understand their unique physicochemical properties. Several generations of astronomers have tracked and mapped the orbits of asteroids and comets over the past few centuries, and telescopic surveys have only begun to discover “new” interstellar objects. In addition, cutting-edge software allow our computers to combine the orbits of these elusive bodies to study how they evolve over time and seek to match asteroid complexes as fragments of asteroidal and cometary disruptions. Impact hazards represent one of the greatest threats to the survival of human beings in the medium term. Geological studies show that the stratigraphic record holds clear geological evidence of these rare but transcendental encounters in the history of life on our planet. The study and quantification of past catastrophes can give us clues to face future challenges in the form of potential impacts. Further, it would be illogical to assume that Earth’s interaction with space is limited to major impacts. Every night, Earth is struck by millions of particles, and dozens of meteor showers occur around the globe every year. The study of lake and ocean sediments reveals the magnitude of the continuous contribution of interplanetary matter reaching Earth: roughly 100,000 tons per year. Accordingly, the goal of this book is to underscore the need for society-wide awareness of the dangers associated with asteroid and comet impacts, on the basis of scientific evidence and with no intention of sparking alarmism. After all, we ourselves may only be the fruit of an opportunity given to mammals sixty-five million years ago to evolve after the conflagration that would be the downfall of the dinosaurs. If we have learned to read Earth’s geological history, we should consider ourselves a very fortunate species, and its teachings should equip us to face this problem. The also book emphasizes the role of space missions to gain insights on these bodies, particularly describing the relevance of the DART (NASA) and Hera (ESA) missions to deflect and study Dimorphos, respectively, the small satellite of the Didymos binary asteroid.
Comet/Asteroid Impacts and Human Society
Comet/Asteroid Impacts and Human Society - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Comet/Asteroid Impacts and Human Society write by Peter T. Bobrowsky. This book was released on 2007-06-10. Comet/Asteroid Impacts and Human Society available in PDF, EPUB and Kindle. Leading specialists in various disciplines were first invited to a multidisciplinary workshop funded by ICSU on the topic to gain a better appreciation and perspective on the subject of comet/asteroid impacts as viewed by different disciplines. This volume provides a necessary link between various disciplines and comet/asteroid impacts.
Mitigation of Hazardous Comets and Asteroids
Mitigation of Hazardous Comets and Asteroids - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Mitigation of Hazardous Comets and Asteroids write by M. J. S. Belton. This book was released on 2004-09-06. Mitigation of Hazardous Comets and Asteroids available in PDF, EPUB and Kindle. It is known that large asteroids and comets can collide with the Earth with severe consequences. Although the chances of a collision in a person's lifetime are small, collisions are a random process and could occur at any time. This book collects the latest thoughts and ideas of scientists concerned with mitigating the threat of hazardous asteroids and comets. It reviews current knowledge of the population of potential colliders, including their numbers, locations, orbits, and how warning times might be improved. The structural properties and composition of their interiors and surfaces are reviewed, and their orbital response to the application of pulses of energy is discussed. Difficulties of operating in space near, or on the surface of, very low mass objects are examined. The book concludes with a discussion of the problems faced in communicating the nature of the impact hazard to the public.
