XPost: sci.astro.research   
   From: helbig@asclothestro.multivax.de   
      
   > In as much as galaxy and star planetary system size distributions   
   > are different, are two different formation temperatures required   
   > within the concept of Jeans' length?   
      
   The Jeans length is important for star formation, but the stuff which   
   forms (rocky) planets is only a small fraction of a larger cloud which   
   collapsed (as described by Jeans) to form a star.  There doesn't seem to   
   be a lower limit on the size of "planets".  There is an obvious upper   
   limit for (gaseous) planets---stars.  The sizes of planets are   
   determined more by accretion, where gravitation is only one factor.   
      
   --- SoupGate-Win32 v1.05   
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