  In a preceeding paper alternative reflections on gravitation were developed.
There it was assumed that the primary interaction between two masses is not of
attractive but of repulsive nature. The repulsive force results from the impuls
transfer produced by the gravitational radiation which is emitted and absorbed
by both masses. The observed attractive force between the two masses according
to Newton`s law of gravitation, however, is a secondary effect and a
consequence of the existence of all the masses in the universe. The mutual
screening of the gravitational radiation of all masses of the universe by the
two masses under consideration leads to the gravitational attraction between
them. The balance between primary, repulsive and secondary, attractive forces
can stabilize highly concentrated spherical mass accumulations with a linear
dependence of their mass on the square of their diameter. Such objects can
really be observed in the universe in the form of globular star clusters,
elliptical galaxies and spherical clusters of galaxies. The scatter of the data
of every group is rather large. But the collection of the objects of all three
groups, reaching from the smallest globular star cluster to the largest
spherical cluster of galaxies, with masses differing by almost 12 orders of
magnitude, clearly shows the proposed mass-diameter relation.
