Quantum Gravity. Gravitons should have momentum just as photons do; and since graviton momentum would cause compression rather than elongation of spacetime outside of matter; it does not appear that gravitons are compatible with Swartzchildu0027s spacetime curvature. Also, since energy is proportional to mass, and mass is proportional to gravity; the energy of matter is proportional to gravity. The energy of matter could thus contract space within matter; and because of the interconnectedness of space, cause the elongation of space outside of matter. And this would be compatible with Swartzchild spacetime curvature. Since gravity could be initiated within matter by the energy of mass, transmitted to space outside of matter by the interconnectedness of space; and also transmitted through space by the same interconnectedness of space; and since spatial and relativistic gravities can apparently be produced without the aid of gravitons; massive gravity could also be produced without gravitons as well.  Gravity divided by an infinite number of segments would result in zero expression of gravity, because it could not curve spacetime. So spatial segments must have a minimum size, which is the Planck length; thus resulting in quantized space. And since gravity is always expressed over some distance in space, quantum space would therefore always quantize gravity. So the nonmediation of gravity by gravitons does not result in unquantized gravity, because quantum space can quantize gravity; thus making gravitons unproven and unnecessary, and explaining why gravitons have never been found.

Relativistic Gravitation Based on Symmetry We present a Relativistic Newtonian Dynamics (    R N D    ) for motion of objects in a gravitational field generated by a moving source. As in General Relativity (    G R    ), we assume that objects move by a geodesic with respect to some metric, which is defined by the field. This metric is defined on flat lab spacetime and is derived using only symmetry, the fact that the field propagates with the speed of light, and the Newtonian limit. For a field of a single source, the influenced direction of the field at spacetime point x is defined as the direction from x to the to the position of the source at the retarded time. The metric depends only on this direction and the strength of the field at x. We show that for a static source, the     R N D     metric is of the same form as the Whitehead metric, and the Schwarzschild metric in Eddingtonxe2x80x93Finkelstein coordinates. Motion predicted under this model passes all classical tests of     G R    . Moreover, in this model, the total time for a round trip of light is as predicted by     G R    , but velocities of light and object and time dilation differ from the     G R     predictions. For example, light rays propagating toward the massive object do not slow down. The new time dilation prediction could be observed by measuring the relativistic redshift for stars near a black hole and for sungrazing comets. Terrestrial experiments to test speed of light predictions and the relativistic redshift are proposed. The     R N D     model is similar to Whiteheadxe2x80x99s gravitation model for a static field, but its proposed extension to the nonstatic case is different. This extension uses a complex fourpotential description of fields propagating with the speed of light.