Spaceborne radar studies of the surface of Venus

Mathematics – Logic

Scientific paper

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Planetary Geology, Planetary Mapping, Radar Astronomy, Relief Maps, Satellite-Borne Radar, Venus Surface, Geological Faults, Northern Hemisphere, Pioneer Venus 1 Spacecraft, Plains, Planetary Evolution, Planetary Structure, Planetology, Plateaus, Plates (Tectonics)

Scientific paper

In December 1978 Pioneer Venus 1 went into orbit around Venus and included in its payload was a novel radar mapping instrument. Now, 700 orbits later the radar results have been collected into a series of maps showing for the first time the continents, mountains, and valleys of our sister planet. The radar information suggests a geology intermediate between that of the earth and Mars. Radar has revealed a vast plateau in the northern hemisphere containing a peak which towers 11 km above the surrounding plain. However, such features are rare with most of the surface comprised of a gentle rolling plain. The spacecraft radar results reveal no evidence of earth type plate tectonics on Venus. The rift areas and great trenches which criss-cross the terrestrial ocean basins are absent. It is tentatively concluded that Venus has evolved geologically much as the earth but not to the same degree.

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