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

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   Message 628 of 1,217   
   Steen to Joseph Groene   
   Re: Astronomical nomenclature question   
   29 Jun 04 22:48:24   
   
   From: virker@ikke.invalid.retro.com   
      
   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?   
      
   I usually just use the terms periapsis and apoapsis.   
      
   /steen   
      
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