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Shapes,structures,and evolution of small bodies

Astrodynamics 2021年第4期5卷 293-329页

作者： Yun Zhang Patrick Michel Universit´e Cote d’Azur Observatoire de la Cote d’AzurCNRSLaboratoire LagrangeNice06304France Department of Aerospace Engineering University of MarylandCollege ParkMD20742USA

Small bodies are among the best tracers of our Solar System’s history.A large number of space missions to small bodies(past and future)offer a unique opportunity to use these bodies as a natural laboratory to study the different processes,mechanical structures,and responses that drive the origin and evolution of small bodies,which are connected to the origin,evolution,and current architecture of the Solar *** of small bodies sent by spacecraft have revealed unexpectedly rich and complex geological *** addition to very diverse compositions,small bodies in the Solar System have highly diverse shapes and structures,which reflect both different evolutionary paths and material ***,each individual body has diverse geological features on its surface,which include craters of various sizes and depths,boulders of different sizes and morphologies,lineaments,fractures,pits,signatures of landslides,terraces,and *** a geological richness could not be detected via ground-based observations,and we are still at the beginning of understanding their significance on the low-gravity surfaces on which they *** combination of space mission data and numerical modeling allows us to enrich our understanding of the origin,evolution,and physical properties of these fascinating *** instance,starting from the shape models,bulk densities,and spin rates determined from space mission data,we can investigate the formation mechanisms that lead to the observed properties of small *** can also infer the interior and mechanical properties(e.g.,friction and cohesion)that allow a small body to be structurally stable,as well as its further potential evolution under processes such as a spin rate increase or an ***,considering the various processes that these bodies experience during their evolution,we can investigate how these processes modify their properties and,in turn,how those properties influence the outcome of these ***

关键词： small bodies internal structure collisional evolution thermal evolution rotational evolution tidal encounter

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