Andrea Milani – författare
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3 produkter
3 produkter
1 486 kr
Skickas inom 7-10 vardagar
Near Earth Objects (NEOs), asteroids and comets, are the closest neighbors of the Earth-Moon system. They allow research not yet possible on more distant bodies. The IAU Symposium 236 focused on the specific observation and modeling techniques for NEOs, including radar, exploration by spacecraft, measurement of non-gravitational perturbations; also on the next generation surveys expected to increase a hundred-fold the NEO discovery rate. With data from first generation NEO surveys, we now understand how they formed and evolve, dynamically and physically, opening a window on the universal astrophysical phenomenon of collision, leaving clear markings on the surfaces of planets, including the Earth. NEOs with orbits crossing that of the Earth are also a source of impact risks and potential NEO collisions with the Earth represent a long term threat. Mankind has to put in place a chain of mitigating actions; NEO astronomers have successfully put in place the first link.
1 303 kr
Skickas inom 7-10 vardagar
Determining orbits for natural and artificial celestial bodies is an essential step in the exploration and understanding of the Solar System. However, recent progress in the quality and quantity of data from astronomical observations and spacecraft tracking has generated orbit determination problems which cannot be handled by classical algorithms. This book presents new algorithms capable of handling the millions of bodies which could be observed by next generation surveys, and which can fully exploit tracking data with state-of-the-art levels of accuracy. After a general mathematical background and summary of classical algorithms, the new algorithms are introduced using the latest mathematical tools and results, to which the authors have personally contributed. Case studies based on actual astronomical surveys and space missions are provided, with applications of these new methods. Intended for graduate students and researchers in applied mathematics, physics, astronomy and aerospace engineering, this book is also of interest to non-professional astronomers.
Asteroids, Comets, Meteors 1993
Proceedings of the 160th Symposium of the International Astronomical Union, Held in Belgirate, Italy, June 14-18, 1993
Inbunden, Engelska, 1994
854 kr
Skickas inom 10-15 vardagar
This symposium was devoted to the so-called minor bodies in the Solar System, and their mutual interrelationships. Asteroids, comets and meteors provide essential information on the history of the Solar System, starting with the early phases of planetary formation, until the present epoch. Different evolutionary processes have shaped the physical characteristics of the populations of minor bodies. Among them, collisional phenomena have played an essential role, as has been generally recognized by modern planetary research. This symposium was one step in the effort to sketch a general unifying scenario of the properties of the different populations of minor bodies, which are generally studied by separate scientific communities. In particular, the most recent findings on the interrelationships between asteroids, comets and meteoroids suggest that an interdisciplinary approach should be preferred. Only in this way can the properties of different populations of minor bodies be interpreted in the framework of a coherent picture of the history and evolution of the Solar System.