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"This book is directed toward readers who are interested in learning about the Newtonian N-body problem, as well as toward students and experts in this area who are interested in new expositions of past results, previously unpublished research conclusions, and new research problems. As many readers will have no previous knowledge about this fascinating area, each chapter starts with introductory material that is motivated by unanswered research questions, includes some history with an occasional anecdote, provides discussions intended to develop intuition, introduces new technical approaches that answer open questions, and raises unsolved research problems. The first chapter, for instance, starts with simple explanations of the apparent "looping" orbit of Mars and the unexpected "Sunrise, Sunset" behavior as viewed from Mercury, to lead up to the unexplained and weird dynamics exhibited by Saturn's F-ring. The second chapter, which introduces a way to decompose the velocity of the system, is motivated by a seemingly easy but unanswered conjecture involving the dynamics of the system when the system's diameter is a constant. The third chapter, which describes questions about the structure of the rings of Saturn, introduces new and surprisingly simple ways to find configurations of the particles that are "central" to any discussion of the N-body problem, or even about those expanding cracks in a car's windshield. The fourth chapter analyzes collisions, while the last chapter discusses the likelihood of collisions and other events."--Jacket.
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Near-Earth objects --- Collisions (Astrophysics) --- Astrophysics --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Collisional processes (Astrophysics) --- Impact processes (Astrophysics) --- NEOs (Near-Earth objects) --- Asteroids --- Comets --- Meteors
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Meteorites. --- Meteorites, Iron. --- Meteorite craters. --- Collisions (Astrophysics) --- Collisional processes (Astrophysics) --- Impact processes (Astrophysics) --- Astrophysics --- Craters, Meteorite --- Meteor craters --- Meteor impact craters --- Impact craters --- Meteorites --- Iron meteorites --- Irons (Meteorites) --- Metallic meteorites --- Meteoric iron --- Iron --- Siderite --- Meteors
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Many times all of us could hear from mass media that an asteroid approached and swept past the Earth. Such an asteroid or comet will inevitably strike the planet some day. This volume considers hazards due to collisions with cosmic objects, particularly in light of recent investigations of impacts by the authors. Each chapter written by an expert contains an overview of an aspect and new findings in the field. The main hazardous effects – cratering, shock, aerial and seismic waves, fires, ejection of dust and soot, tsunami are described and numerically estimated. Numerical simulations of impacts and impact consequences have received much attention in the book. Fairly small impacting objects 50 -100 m in diameter pose a real threat to humanity and their influence on the atmosphere and ionosphere is emphasized. Especially vulnerable are industrially developed areas with dense population, almost all Europe is one of them. Special chapters are devoted to the famous 1908 Tunguska event and new results of its simulations, bolides in the atmosphere and impacts on the early Earth.
Asteroids --- Catastrophes (Geology) --- Collisions (Astrophysics) --- Near-earth asteroids. --- Collisions with Earth --- Environmental aspects --- Forecasting. --- History. --- Planet-crossing asteroids --- Collisional processes (Astrophysics) --- Impact processes (Astrophysics) --- Minor planets --- Planetoids --- Planets, Minor --- Physics. --- Earth sciences. --- Geophysics. --- Planetology. --- Space sciences. --- Extraterrestrial Physics, Space Sciences. --- Earth Sciences, general. --- Geophysics/Geodesy. --- Theoretical, Mathematical and Computational Physics. --- Astrophysics --- Historical geology --- Near-Earth objects
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Galaxy collisions are the key process in building galaxies, triggering the formation of stars and the build-up of heavy elements that allow the formation of planets and solar systems. This book presents the revolutionary research advances achieved in the last decade and lucidly explains the underlying dynamical processes. Galaxy Collisions takes a comprehensive trip through the visually spectacular world of galaxy collisions; investigates the interactions of stars, gas clouds, and dark matter in galaxy collisions; uses analogies and metaphors to help comprehend the bizarre world of galaxies; presents recent research results to enhance the understanding of galaxy formation and evolution; includes discoveries of minor collisions within our own group of galaxies; shows how a galaxy collision might affect a solar system, or a planet like ours.
Collisions (Astrophysics). --- Galaxies. --- Galactic dynamics --- Collisions (Astrophysics) --- Galaxies --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Astrophysics --- Astronomy - General --- Astrophysics. --- Astronomical physics --- Collisional processes (Astrophysics) --- Impact processes (Astrophysics) --- Popular works. --- Gravitation. --- Astronomy. --- Cosmology. --- Observations, Astronomical. --- Astronomy --- Popular Science. --- Popular Science in Astronomy. --- Astronomy, Observations and Techniques. --- Astronomy, Astrophysics and Cosmology. --- Classical and Quantum Gravitation, Relativity Theory. --- Observations. --- Cosmic physics --- Physics --- Astronomy—Observations. --- Field theory (Physics) --- Matter --- Antigravity --- Centrifugal force --- Relativity (Physics) --- Astronomical observations --- Observations, Astronomical --- Properties
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Lately there have been more and more news stories on objects from space – such as asteroids, comets, and meteors – whizzing past Earth. One even exploded in the atmosphere over a Russian city in 2012, causing real damage and injuries. Impacts are not uncommon in our Solar System, even on Earth, and people are beginning to realize that we must prepare for such an event here on Earth. What if we knew there was going to be an impact in 10 years’ time? What could we do? It’s not so far in the future that we can ignore the threat, and not so soon that nothing could be done. The author and his colleagues set out to explore how they could turn aside a rock asteroid, one kilometer in diameter, within this 10-year timescale. Having set themselves this challenge, they identified the steps that might be taken, using technologies that are currently under development or proposed. They considered an unmanned mission, a follow-up manned mission, and a range of final options, along with ways to reduce the worst consequences for humanity if the impact cannot be prevented. With more warning, the techniques described could be adapted to deal with more severe threats. If successful, they can generate the capability for a much expanded human presence in space thereafter. With the dangers now beginning to be recognized internationally and with major new programs already in motion, the prospects for civilization and humanity, in relation to the danger of impacts, look much more hopeful than they did only a decade ago.
Asteroids --- Collisions (Astrophysics) --- Collisional processes (Astrophysics) --- Impact processes (Astrophysics) --- Collisions of asteroids with Earth --- Impact of asteroids with Earth --- Collisions with Earth. --- Asteroids -- Collisions with Earth. --- Engineering. --- Planetology. --- Space sciences. --- Astronomy. --- Aerospace engineering. --- Astronautics. --- Aerospace Technology and Astronautics. --- Popular Science in Astronomy. --- Extraterrestrial Physics, Space Sciences. --- Astrophysics --- Natural disasters --- Near-earth asteroids --- Astrophysics. --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Planetary sciences --- Planetology --- Astronomical physics --- Astronomy --- Cosmic physics --- Physics --- Space sciences --- Aeronautics --- Astrodynamics --- Space flight --- Space vehicles --- Science and space --- Space research --- Cosmology --- Science --- Aeronautical engineering --- Astronautics --- Engineering
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"Cosmic Threats : A Planetary Perspective calls for the progressive creation of supra-national institutions intended to protect life on Earth against natural threats, be these terrestrial (pandemics, super-volcanoes, major earthquakes...) or celestial (comets, asteroids, meteor storms...). The protection proffered would need to be pre-emptive though also responsive, reducing the number of adverse events but also their specific consequences. Rancid though the world scene currently looks, this may actually be a good time to look towards a planetary security programme that can build up over a century or more. It would need special international institutions that are sufficiently integrated to cope with the celestial and terrestrial contingencies anticipated yet not so much a class apart as to be a law unto themselves, a military regime able to ride roughshod over general world opinion. Such an holistic approach to planetary security might prove to be a definitive substitute for war between nations. Professor Brown comes to such questions from a broad career background. His lead qualifications are a Masters degree from Oxford in Modern History and a Doctorate of Science from Birmingham (UK) in Applied Geophysics. He has been a naval meteorologist; staff college instructor; part-time but pro-active as a defence correspondent for several of the West's leading journals; and political consultant. From 1980 to 1986, he was Chairman of the Council for Arms Control. From 1993 to 1997 he worked half-time in the Sensors and Electronic Systems directorate of Britain's Ministry of Defence. This was as the Academic Consultant in a small task force specifically created to advise the government of the day apropos what British policy to Strategic Ballistic Missile Defence should be"--Provided by publisher.
Emergency management --- Disaster relief --- Natural disasters --- Collisions (Astrophysics) --- Security, International. --- Defensive (Military science) --- Attack and defense (Military science) --- Defenses (Military science) --- Defensive (Military strategy) --- Military art and science --- Collective security --- International security --- International relations --- Disarmament --- International organization --- Peace --- Collisional processes (Astrophysics) --- Impact processes (Astrophysics) --- Astrophysics --- Natural calamities --- Disasters --- Disaster assistance --- Emergency assistance in disasters --- Emergency relief --- Human services --- Consequence management (Emergency management) --- Disaster planning --- Disaster preparedness --- Disaster prevention --- Emergencies --- Emergency planning --- Emergency preparedness --- Management --- Public safety --- First responders --- International cooperation. --- Government policy. --- Planning --- Preparedness --- Prevention --- Security, International --- International cooperation --- Government policy --- E-books
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