The only things that affect the forces of gravity are ...
-- the product of the masses of the two objects, and
-- the distance between the centers of the two objects.
============================================
-- The strength of the gravitational force is directly proportional to the product of
the two masses. If the product of the two masses is multiplied by ' Q ', then the
strength of the gravitational forces between them is also multiplied by ' Q '.
-- The strength of the gravitational force is inversely proportional to square of
the distance between the centers of the two masses. If the distance between
their centers is multiplied by ' K ', then the strength of the gravitational forces
between them is multiplied by 1/K² .
