NASA Photo ID: S90-49777           File Name: 10063347.jpg
  Film Type: 4x5 BW                  Date Taken: 10/09/90
  Title: Magellan radar image compared to high resolution Earth-based image of Venus
  Description:
  A strip of a Magellan radar image (left) is compared to a high resolution 
  Earth-based radar image of Venus, obtained by the U.S. National Astronomy
  and  Ionosphere Center's Arecibo Observatory in Puerto Rico.  The small
  white box  in the Arecibo image corresponds to the Magellan image.  This
  portion of the  Magellan imagery shows a small region on the east flank of
  a major volcanic  upland called Beta Regio.  The image is centered at 23
  degrees north latitude  and 286.7 degrees east longitude.  The ridge and
  valley network in the middle  part of the image is formed by intersecting
  faults which have broken the  Venusian crust into a complex deformed type
  of surface called tessera, the  Latin word for tile.  The parallel
  mountains and valleys resemble the Basin  and Range Province in the western
  United States.  The irregular dark patch  near the top of the image is a
  smooth surface, probably formed, according to  scientists, by lava flows in
  a region about 10 kilometers (6 miles) across.   Similar dark surfaces
  within the valleys indicate lava flows that are younger  than the tessera. 
  The Arecibo image contains probably impact craters, many  faults, volcanic
  flows and tessera regions that will be mapped in detail by  Magellan.  The
  Magellan image has a resolution of 120 meters (400 feet).   View provided
  by the Jet Propulsion Laboratory (JPL) with alternate number  P-36523.   
  
  Subject terms:
  CRATERS                                 
  FAULTS                                  
  MAGELLAN SPACECRAFT (NASA)              
  RADAR DATA                              
  VENUS (PLANET)                          
  VENUS SURFACE                           
  VOLCANOES                               
  

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