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   sci.space.science      Space and planetary science and related      1,217 messages   

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   Message 623 of 1,217   
   Marshall Perrin to Joseph Groene   
   Re: Astronomical nomenclature question   
   25 Jun 04 13:42:21   
   
   From: mperrin+news@cymric.berkeley.edu   
      
   Joseph Groene  wrote:   
   >    I have a question.  Consider an orbit around the   
   > Earth.  The point in an elliptical orbit around the   
   > Earth that is nearest to the center of the Earth is   
   > called perigee.  The point in an elliptical orbit   
   > that is farthest from the center of the Earth is   
   > called apogee.  For an orbit around the Moon, the   
   > terms are perilune and apolune.  For Jupiter,   
   > perijove and apojove.  What are the proper terms   
   > for Mars?  For Saturn?   
      
   'pericenter' and 'apocenter' or the equivalent 'periapsis' and   
   'apoapsis' are applicable in all cases. The appropriate Greek   
   suffixes for Mars and Saturn are '-ares' and '-chron', but I've   
   never heard anyone use those.   
      
    - Marshall   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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