Other
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992azh....69..850d&link_type=abstract
Astronomicheskij Zhurnal (ISSN 0004-6299), vol. 69, no. 4, p. 850-862.
Other
Hypervelocity Impact, Mercury (Planet), Planetary Evolution, Silicates, Venus (Planet), Asteroids, Planetology, Solar System Evolution
Scientific paper
The possibility of hypervelocity impact-induced ejection of kilometer-size asteroid bodies from the earth and other planets makes possible a self-sustaining bombardment due to an additional gain in energy by the fragments ejected into space by planetary perturbations. The conditions for an avalanche-type development of the process are the most favorable for the innermost planets possessing the highest orbital motion energy. It is shown that these conditions are met for Mercury, which can account for the ancient ejection of its silicate envelope. Judging from the ejected silicate mass, the original orbit of Mercury was close to that of Venus, which confirms the hypothesis that Mercury is Venus' lost satellite and is capable of accounting for many features of these planets.
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