Mercury - A post-Mariner 10 assessment

Astronomy and Astrophysics – Astronomy

Scientific paper

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Mariner 10 Space Probe, Mercury (Planet), Planetary Craters, Planetary Evolution, Planetary Surfaces, Planetology, Spaceborne Photography, Astronomical Photography, Orbital Mechanics, Planetary Environments, Planetary Magnetic Fields, Planetary Structure, Tectonics, Review, Mariner 10, Mercury, Core, Mantle, Topography, Albedo, History, Craters, Mission Description, Motion, Orbits, Rotation, Environment, Atmosphere, Magnetic Fields, Emissions, Surface, Basins, Ejecta, Interior, Structure, Plains, Scarps, Te

Scientific paper

The paper reviews the analyses of the imagery since the Mariner 10 flight, and considers the implications for the surface evolution of the terrestrial planets. Mercury is probably differentiated into a large iron-rich core and a thin silicate mantle. It differs from the moon by having (1) large areas of old intercrater plains, (2) a wide-spread distribution of lobate scarps, and (3) a similar albedo between young smooth plains and the older mercurian highlands. The origin of Mercury's plains and lobate scarps is discussed, and it is concluded that the crater diameter density distribution on the moon, Mars, and Mercury indicates that all the terrestrial planets experienced intense bombardment early in their histories, and that the objects responsible for this bombardment probably belonged to the same population(s).

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