Surface history of the terrestrial-type planets

Details Surface history of the terrestrial-type planets Surface history of the terrestrial-type planets

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981esasp.164..129n&link_type=abstract

In ESA The Solar System and its Exploration p 129-137 (SEE N82-26087 16-88)

Astronomy and Astrophysics

Astronomy

2

Earth Surface, Lunar Surface, Mars Surface, Mercury (Planet), Meteoritic Damage, Planetary Craters, Dione, Ganymede, Mimas, Rhea (Astronomy), Size Distribution, Spatial Distribution, Time Dependence

Scientific paper

The ancient impact records of Mercury, Mars, Earth's moon, and of the satellites of Jupiter and Saturn are analyzed, using spacecraft imagery. The use of multispectral imagery in planetary surface studies for obtaining information on mineralogy/chemistry is discussed, using the Moon and Mars as examples. The mass-velocity distribution of the impactors is the same or very similar in the inner part of the solar system, and on Jupiter and Saturn. Ancient impact rates are comparable. The time dependance of the impact rate in the Earth-Moon system, and by analogy at the other terrestrial-type planets, suggests a smooth rapid decay during the first billion years of solar system history rather than a peak in impact rate (cataclysm) 4 billion years ago. The reconstruction of martian impact chronology, shows that Mars was geologically active in its early times essentially.

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