3. Gravitation

The BF is no gravitational field by itself. Gravitation happens only if there are fermions with certain kinetic energy inside the space. Since in our universe, every particle is in a constant movement together with all the existing galaxies and other celestial formations, fermions are therefore constantly interacting with VG of the BF. A part of the kinetic energy of fermions is transferred to VG, and according to [1], RG are produced in form of gravitation waves.

For each interacting VG that leaves the BF as a RG, there is a momentary reduction of the BF, and the BF consequently contracts. A second particle close to an interacting particle is pushed consequently closer to the latter. Therefore, it seems to exist a force that tends to attract both particles mutually, but in effect, it is the BF that has contracted between both particles, thus producing the "illusion" of a gravitational attraction. In consequence, a constant momentary reduction of the BF due to the presence of moving fermions is what we call the "gravitational field."

A momentary reduction of the BF is able to approach two fermions mutually, since both are constantly interacting with VG of the BF and are therefore constantly anchored to it. This is because neutral interactions loose the strings that maintain VG linked in the BF. In order to loose a string, it is necessary that a fermion connects physically to a VG, and in this state, it is anchored to the BF and can be moved by momentary reductions. Furthermore, any fermion is very large with regard to VG, so that it always interacts with several VG at the same time and never stops to interact.

The faster a fermion is, the more interactions with VG happen and the more the BF contracts. In consequence, faster particles have a higher "gravitational attraction" than slower particles. In consequence, the gravitational attraction of a particle could be very small or zero if it did not move with respect to the BF.

Finally, gravitational attraction is always directed towards the center of a body since VG are linked together by means of strings, thus building field lines of the gravitational field that end in the center of the corresponding body since every single particle of a body necessarily interacts with the BF. The radial disposition of field lines towards the center of a body is the less energetic state of such a field.