Consequences of collisions of natural cosmic bodies with the Earth’s atmosphere and surface |
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Authors: | M I Gritsevich V P Stulov L I Turchak |
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Institution: | 1.Research Institute of Mechanics and Faculty of Mechanics and Mathematics of Lomonosov Moscow State University,Moscow,Russia;2.Department of Physics,University of Helsinki,Helsinki,Finland;3.Dorodnitsyn Computation Center of the Russian Academy of Sciences (RAS),Moscow,Russia |
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Abstract: | Possible consequences of collisions of natural cosmic bodies with the Earth’s atmosphere and surface are described. The methodological
basis of classification of consequences is the solution of meteor physics equations characterizing the trajectory of a body
in the atmosphere, namely, the dependence of the body’s velocity and mass on the flight altitude. The solution depends on
two dimensionless parameters characterizing the drag altitude and the role of mass loss by a meteoroid during its motion in
the atmosphere. Depending on values of these parameters, the degree of effect on the planetary surface considerably changes.
In particular, the conditions of cratering and meteorite fall on the planetary surface are obtained. The results are presented
in a simple analytical form. They quite match to the real events considered in the paper. Recommendations are given on further
investigations into the important problem of interaction of cosmic bodies with planetary atmospheres. |
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