In this equation, we call the above-mentioned independent right component “mass attraction” because it depends only on masses and their relative position. According to the “cause-effect principle”, the left component (G) can be considered “vacuum reaction” to gravitation since matter is obviously the origin of any gravitation. (A similar vacuum reaction to accelerated matter is known as Davies-Unruh effect (9, 10) and demonstrates that vacuum effectively reacts to the presence of matter. In addition, since in (4), d_ZP represents vacuum mass-density equivalent, reaction to gravitation is a vacuum effect).

The first we observe in (4) is that gravity is inversely proportional to vacuum energy (d_ZP). In consequence, if we manipulated vacuum energy, we would parallel be manipulating gravity.

Further, if QV did not exist, ZPR would be zero and according to (4), gravitational force would be infinite. And opposite, if ZPR was infinite, gravity would be zero. In 11, we already mentioned a herewith related case with regard to the extreme high temperature of the solar corona (up to 2x10⁶°C) with respect to the photosphere or surface of the sun (only 5,500°C). Probably, the very dense solar photon stream produces “holes” in the fabric of spacetime, so that ZPR emerges from QV and heats up the solar corona. In consequence, we predict that in the solar corona, gravity could be weaker than normal.

To understand the nature of QV and why ZPR is able to reduce gravity, we make the following experiment of thought:

Imagine a flat universe (sheet) located in spacetime (our frame). Any spacetime radiation that crosses the sheet, will produce effects in the sheet, but will not remain there. Eventual inhabitants of the sheet (flatlanders) will notice radiation effects, but will see no radiation. Analogous happens in our universe: Vacuum radiation that crosses spacetime, produces Casimir-like effects, but cannot be seen nor detected because of its alien location.

Since QV is a 6-D space 2 that surrounds 4-D spacetime completely due to its natural superior extension, spacetime matter is completely surrounded by ZPR. If an object is moving uniformly or at rest, ZPR will be the same on any surface. But as soon as the object accelerates, a Doppler-effect takes place (see also 3 for analogous explanation), so that ZPR becomes more dense in the direction of movement and less dense behind the object. This produces a higher ZPR pressure in the opposite direction of movement, so that an effective “vacuum reaction” takes place, with the consequence that the initial acceleration is reduced. This effect is commonly known as “inertia” and per definition also somehow related to the much weaker Davies-Unruh effect.

This means that vacuum reacts to acceleration by opposing ZPR-borne inertia.

In the case of static bodies, ZPR produces a homogenous radiation pressure, so that no neat vacuum reaction or inertia takes place. But if we managed to increase ZPR, according to (4), we would induce vacuum reaction artificially and gravitation would therefore weaken in a parallel extent. In consequence, not only acceleration is able to produce vacuum reaction (Davies-Unruh, inertia), but also any phenomenon that affects vacuum density.

This can be understood as that vacuum reaction happens in the opposite direction to the existing gravitational fields. Through Newtons equation of motion, F=ma, any body subjected to a field of force (in this case, gravitation), is also subjected to a potential acceleration toward attracting bodies. In consequence, vacuum reaction will produce a reaction force via ZPR pressure that is opposed to the main direction of the corresponding gravitational fields, with the final result that, even bodies in a stiff gravitational system are subjected to a neat ZPR reaction force opposite to the direction of the field (although not to inertia, since they are not accelerated. In consequence, inertia and vacuum reaction to a force differ in stiff systems and are not exactly the same).