Physics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978m%26p....19...89g&link_type=abstract
Moon and the Planets, vol. 19, Aug. 1978, p. 89-98.
Physics
2
Chemical Reactions, Planetary Evolution, Rarefied Gas Dynamics, Reaction Kinetics, Solar System, Abundance, Astronomical Models, Cloud Physics, Condensation, Heavy Elements, Hydrides
Scientific paper
Some specific features of the matter condensation in a preplanetary cloud that leads to the formation of planets and their satellite systems are discussed. A model is considered according to which chemical reactions in the protocloud and supersaturation of the substances produced resulted in rings of condensed matter, which subsequently accumulated to form planets, and gravitational compression then heated the protoplanets, diffused their matter into gaseous envelopes, and led to the formation of planetary rings and, subsequently, satellites. The mechanism of chemical reactions in a rarefied gas is examined, and some simple models are described which might account for the history of the solar system. A heavy-element transport model is outlined which assumes the formation of hydrides and carbonyl hydrides of iron and which is in good agreement with the hypothesis that planetary and satellite nuclei consisted primarily of certain Fe, Mg, Si, and C compounds.
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