Computer Science
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983kosis..21..421i&link_type=abstract
Kosmicheskie Issledovaniia (ISSN 0023-4206), vol. 21, May-June 1983, p. 421-435. In Russian.
Computer Science
Atmospheric Composition, Isotopes, Planetary Atmospheres, Protoplanets, Rare Gases, Solar System, Terrestrial Planets, Lunar Atmosphere, Meteoritic Composition, Pioneer Venus Spacecraft, Venera Satellites
Scientific paper
Abundances of rare-gas in the atmospheres of the terrestrial planets, on the sun, in meteorites, and in the lunar regolith are investigated with allowance for existing models of the protoplanetary nebula. Support is provided for the hypothesis that the greater part of the rare gases and some of the chemically active gases entered the terrestrial-planet atmospheres by direct accretion from the gas of the protoplanetary nebula. Venera 13 and 14 and Pioneer-Venus data are presented in support of this hypothesis. The implications of this hypothesis for the early evolution of the solar system are considered.
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