Is  these  things tat  i  write   right ?  If  there is a  part in a  planet  that  have bulged out too much  or  concaved  in  too much............   The  gravity  of the planet  would pull in the  bulged  out part  and  fill in the  concavity and  add the volume of the bulgness to  the   radius of the  planet  equally   and also  the volume of the concavity  would  be equally  reduced  from the radius  .....