Hello Roy.   
      
   11 Jun 13 10:22, you wrote to alexander koryagin:   
      
      
   RW> That's the same way that naut is used in the English language. Also in   
   RW> English, astro- means 'outer space' not specifically 'stars'...the   
   RW> study of the stars is called astrology, while the study of astrometry   
   RW> is of a celestial body, such as Mars or the Sun.   
      
   French "astre" and Spanish and Italian "astro" roughly mean "astronomical    
   object" or "celestial object" (with differences like visibility, according to   
   Wikipedia).   
      
      
   Aleksej   
      
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