Shapes And Spins Of Near Earth Asteroids
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Shapes and Spins of Near Earth Asteroids
Author | : Michael W. Busch |
Publsiher | : Universal-Publishers |
Total Pages | : 126 |
Release | : 2010-05 |
Genre | : Science |
ISBN | : 9781599423227 |
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Asteroids are diverse and numerous solar system objects, from the large number of objects in the main asteroid belt to the relatively small near-Earth population. Understanding their physical properties is essential to understanding the evolution of the solar system, and asteroid morphology is a complex field in its own right. The histories of individual asteroids, and particularly near-Earth objects, reflect continuous interaction among their shapes, rotation states, and orbits due to the effects of radiation pressure. Radar astronomy has provided detailed information on the orbits, sizes, shapes, rotation states, and composition of many asteroids. To improve the capabilities of asteroid radar observations, I have developed the technique of radar speckle tracking. The echoes from different points on the surface of a radar target interfere with each other, producing a pattern of bright and dark speckles across the surface of the Earth. Using radio astronomy techniques, I track the motion of speckles between several ground stations during a radar experiment to accurately determine the rotation state of the target. Speckle tracking is a powerful tool both to determine the orbital evolution of near-Earth asteroids, particularly potential Earth impactors, and to survey the overall physical properties of the asteroid population. In addition, I have studied applying the techniques of adaptive optics and radio interferometry to asteroid science. These will become more useful with the next generation of asteroid-detecting surveys and the construction of large sub-millimeter interferometers. Interferometry in particular will soon be able to survey the entire asteroid belt.
Asteroids IV
Author | : Patrick Michel,Francesca E. DeMeo,William F. Bottke |
Publsiher | : University of Arizona Press |
Total Pages | : 946 |
Release | : 2015-12-31 |
Genre | : Science |
ISBN | : 9780816532131 |
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"More than forty chapters detail our current astronomical, compositional, geological, and geophysical knowledge of asteroids, as well as their unique physical processes and interrelationships with comets and meteorites"--Provided by publisher.
Near Earth Objects Our Celestial Neighbors IAU S236
Author | : International Astronomical Union. Symposium |
Publsiher | : Cambridge University Press |
Total Pages | : 538 |
Release | : 2007-05-24 |
Genre | : Science |
ISBN | : 0521863457 |
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IAU S236 concentrates on specific techniques of observation and modeling Near Earth Objects (NEOs).
Asteroids III
Author | : William Frederick Bottke |
Publsiher | : University of Arizona Press |
Total Pages | : 818 |
Release | : 2002-01-01 |
Genre | : Science |
ISBN | : 0816522812 |
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Two hundred years after the first asteroid was discovered, asteroids can no longer be considered mere points of light in the sky. Spacecraft missions, advanced Earth-based observation techniques, and state-of-the-art numerical models are continually revealing the detailed shapes, structures, geological properties, and orbital characteristics of these smaller denizens of our solar system. This volume brings together the latest information obtained by spacecraft combined with astronomical observations and theoretical modeling, to present our best current understanding of asteroids and the clues they reveal for the origin an,d evolution of the solar system. This collective knowledge, prepared by a team of more than one hundred international authorities on asteroids, includes new insights into asteroid-meteorite connections, possible relationships with comets, and the hazards posed by asteroids colliding with Earth. The book's contents include reports on surveys based on remote observation and summaries of physical properties; results of in situ exploration; studies of dynamical, collisional, cosmochemical, and weathering evolutionary processes; and discussions of asteroid families and the relationships between asteroids and other solar system bodies. Two previous Space Science Series volumes have established standards for research into asteroids. Asteroids III carries that tradition forward in a book that will stand as the definitive source on its subject for the next decade.
Shapes and Dynamics of Granular Minor Planets
Author | : Ishan Sharma |
Publsiher | : Springer |
Total Pages | : 354 |
Release | : 2016-11-01 |
Genre | : Science |
ISBN | : 9783319404905 |
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This book develops a general approach that can be systematically refined to investigate the statics and dynamics of deformable solid bodies. These methods are then employed to small bodies in the Solar System. With several space missions underway and more being planned, interest in our immediate neighbourhood is growing. In this spirit, this book investigates various phenomena encountered in planetary science, including disruptions during planetary fly-bys, equilibrium shapes and stability of small rubble bodies, and spin-driven shape changes. The flexible procedure proposed here will help readers gain valuable insights into the mechanics of solar system bodies, while at the same time complementing numerical investigations. The technique itself is built upon the virial method successfully employed by Chandrasekhar (1969) to study the equilibrium shapes of spinning fluid objects. However, here Chandrasekhar’s approach is modified in order to study more complex dynamical situations and include objects of different rheologies, e.g., granular aggregates, or “rubble piles”. The book is largely self-contained, though some basic familiarity with continuum mechanics will be beneficial.
Treatise on Geophysics
Author | : Anonim |
Publsiher | : Elsevier |
Total Pages | : 5604 |
Release | : 2015-04-17 |
Genre | : Science |
ISBN | : 9780444538031 |
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Treatise on Geophysics, Second Edition, is a comprehensive and in-depth study of the physics of the Earth beyond what any geophysics text has provided previously. Thoroughly revised and updated, it provides fundamental and state-of-the-art discussion of all aspects of geophysics. A highlight of the second edition is a new volume on Near Surface Geophysics that discusses the role of geophysics in the exploitation and conservation of natural resources and the assessment of degradation of natural systems by pollution. Additional features include new material in the Planets and Moon, Mantle Dynamics, Core Dynamics, Crustal and Lithosphere Dynamics, Evolution of the Earth, and Geodesy volumes. New material is also presented on the uses of Earth gravity measurements. This title is essential for professionals, researchers, professors, and advanced undergraduate and graduate students in the fields of Geophysics and Earth system science. Comprehensive and detailed coverage of all aspects of geophysics Fundamental and state-of-the-art discussions of all research topics Integration of topics into a coherent whole
Asteroids Comets and Meteorites
Author | : Jon Erickson |
Publsiher | : Infobase Publishing |
Total Pages | : 273 |
Release | : 2014-05-14 |
Genre | : Asteroids |
ISBN | : 9781438109626 |
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Looks at asteroids, comets and meteorites, including what they are, how they are formed, how they have affected the history of Earth, and definitions of related terms.
Exploring the Solar System
Author | : Peter Bond |
Publsiher | : John Wiley & Sons |
Total Pages | : 471 |
Release | : 2012-02-29 |
Genre | : Science |
ISBN | : 9781444398366 |
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The exploration of our solar system is one of humanity's greatest scientific achievements. The last fifty years in particular have seen huge steps forward in our understanding of the planets, the sun, and other objects in the solar system. Whilst planetary science is now a mature discipline - involving geoscientists, astronomers, physicists, and others – many profound mysteries remain, and there is indeed still the tantalizing possibility that we may find evidence of life on another planet in our system.Drawing upon the latest results from the second golden age of Solar System exploration, author Peter Bond provides an authoritative and up-to-date account of the planets, satellites and smaller debris that orbit the Sun. Written in an informal style, with minimal use of mathematics, this book is the ideal introductory text for non-science students and other readers with little or no science background. With the aid of numerous illustrations, many in full colour, this exciting book brings to life the weird and wonderful worlds that populate our corner of the Universe. This book: Assumes no background in physics , astronomy or mathematics Carefully explains key concepts Gives balanced coverage to areas of controversy or uncertainty in planetary science Is in in full color throughout and richly illustrated An interview with Peter can be found at http://wisciblog.com/2012/02/28/exploring-the-solar-system/