XPost: sci.physics, sci.physics.relativity   
      
   George Kinley wrote:   
   >   
   > Hi,   
   > If our galaxy is rotating around other group of galaxy under influenece   
   > of combined gravity of galaxies, which mean that combined gravity of   
   > all the galaxy should be more then gravity of individual black hole   
   > present in the centre of every galaxy, so how does light travel under   
   > such emmence gravity   
      
   Your statement "that combined gravity of   
   all the galaxy should be more then gravity of individual black hole"   
   is naive.   
      
   Gravity is a local force that can be stronger or weaker   
   at any location.  The effect of gravity NEAR the event   
   horizon of a black hole is much stronger than the effect   
   much farther away.  The effect of distant galaxies FAR from   
   the event horizon is much stronger than the effect of the black   
   hole.   
      
   Look at Newtonian gravity.  The effect of gravity at the surface   
   of the earth is much weaker than the gravity of the sun that   
   keeps the earth in orbit.  Otherwise, we would be pulled off   
   the earth into the sun.   
      
   John Anderson   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)