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Chondrites are one of the major groups of meteorites. They consist of spherical objects called chondrules, which are typically (sub-)millimeter-sized, and fine-grained matrix between the chondrules. There exists a variety of models on the formation of chondrules, most of which have in common that chondrules were formed at some local place in the protoplanetary disk and later incorporated into the...
Porous internal structure is common among small bodies in the planetary systems and possible range of porosity, strength, and scale of in-homogeneity is wide. Icy agglomerates, such as icy dust aggregates in the proto-planetary disks or icy re-accumulated bodies of fragments from impact disruption beyond snow-line would have stronger bulk strength once the component particles physically connect each...
More and more small bodies are found to be porous. Laboratory impact experiments of various porous materials have been performed, which increased our understanding of the impact process of porous bodies. In this review, we classify porous targets according to the internal structure, describe the physical properties that characterize these materials, and summarize some results of impact strength and...
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