Mathematics – Logic
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980sciam.243...54p&link_type=abstract
Scientific American, vol. 243, Aug. 1980, p. 54-65.
Mathematics
Logic
1
Astronomical Photography, Planetary Mapping, Radar Imagery, Venus Surface, Cloud Cover, Geological Surveys, Rain Erosion, Spaceborne Photography, Venus, Surface, Radar, Imagery, Geology, Obsevations, Diagrams, Remote Sensing, Mapping, Maps, Altitudes, Maxwell Montes, Analysis, Distribution, Features, Comparisons, Topography, Atmosphere, Temperatures, History, Review, Rotation, Equipment, Radius, Physical Properties, Pressure, Composition, Doppler Effects, Techniques, Scattering, Wavelengths, Brightness, Alp
Scientific paper
Radar images of Venus were assembled from observations made at the Arecibo Observatory in Puerto Rico in 1975 and 1977 when Venus made close approaches to the earth. The empty band below the equator is a region where in 1975 and 1977 the imaging method was unable to resolve the radar echoes. Shrouded by clouds, the surface of Venus is now mapped by radar from the earth and from a spacecraft in orbit around Venus and the images suggest a geology intermediate between that of the earth and that of Mars. From a synthesis of all the data now available there begins to emerge the picture of a planet nearly the size of the earth whose surface has been modified by all the processes that have shaped the earth's surface except erosion by rain.
Campbell Don B.
Masursky Harold
Pettengill Gordon H.
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