XPost: sci.physics   
   From: someone@microsoft.com   
      
   Hi,   
      
   The Local Group comprises more than 54 galaxies,and its gravitational center   
   of mass is located between the Milky Way and the Andromeda Galaxy.   
   Otherwise, the Local Group center of mass is only known with great   
   uncertainty. This is important because beyond the Local Group galaxies   
   exceed escape velocity, and can be ignored in practical cosmology.   
      
   One statement of Heisenberg's uncertainty principle says the dot product of   
   position and momentum vectors cannot be zero. When equated to the reduced   
   Planck constant, this permits us to compute a reasonable estimate of the   
   uncertainty of the Local Group momentum vector from a reasonable estimate of   
   its center of mass position. Is this reasonable?   
      
   As I see it, only reasonable estimates of order of magnitude are of value.   
   But, is this a new question?   
      
   Thanks   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)