From: hrubin@stat.purdue.edu   
      
   In article <3fd908bc.82642585@news.eircom.net>,   
   Russell Wallace  wrote:   
   >On 10 Dec 2003 17:37:01 GMT, baalke@zagami.jpl.nasa.gov (Ron Baalke)   
   >wrote:   
      
   >>"Our simulations show a tremendous variety of planets. You can have planets   
   >>that are half the size of Earth and are very dry, like Mars, or you can have   
   >>planets like Earth, or you can have planets three times bigger than Earth,   
   >>with perhaps 10 times more water," said Sean Raymond, a University of   
   >>Washington doctoral student in astronomy.   
      
   >Solid planets three times Earth's diameter? i.e. with more than 27   
   >times the mass? (Presumably considerably more than 27 times, since the   
   >core would be pretty compressed at that stage.) Is that really   
   >possible?   
      
   If the density is the same, gravity, which is proportional   
   to radius times density, would be three times as great.   
      
   On the other hand, if it is three times as massive with the   
   same density, the gravity would be less than 1.45 as great.   
   --   
   This address is for information only.  I do not claim that these views   
   are those of the Statistics Department or of Purdue University.   
   Herman Rubin, Department of Statistics, Purdue University   
   hrubin@stat.purdue.edu         Phone: (765)494-6054   FAX: (765)494-0558   
      
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