What initiated planetesimal formation?

Details What initiated planetesimal formation? What initiated planetesimal formation?

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994lpi....25..307c&link_type=abstract

In Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 1: A-G p 307-308 (SEE N94-35395 11-9

Mathematics

Logic

4

Chondrites, Meteorites, Planetary Evolution, Planetary Geology, Protoplanets, Gravitational Fields, Nebulae

Scientific paper

The physical structure of primitive (chondritic) meteorites, even after some geological processing and modification, is thought by most to contain clues as to the first stage of accretion of solid matter into objects that might be called planetesimals. However, theoretical understanding of the processes responsible for this important stage is shaky. We note what we believe are fundamental obstacles for the Goldreich-Ward version of rapid and direct planetesimal formation via gravitational instability in a settled particle layer, and describe an alternative scenario which might lead from grainy nebula gas to primitive planetesimals in a way that has intriguing connections to the meteorite evidence.

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