Dark matter phenomenon is an important mystery in the current agenda, which cannot be explained by the Theory of General Relativity.

Stars in galaxies move at a very fast speed as if they are held together by the gravitational field of some invisible material. More interestingly, they do not move a little faster, and the amount of matter to cause such a gravitational field seems to be much more than it is observed. This phenomenon of the missing matter in a cluster of galaxies is known as the dark matter mystery.

As we discussed previously, this paper suggests that the energy content of matter (rest mass) relatively increases when matter is joined together with other matter in a heap. In other words, the sum becomes more massive than its parts. Of course, the increase in the matter content (in the sum of energies of the local strain formations) occurs against the increased gravitational field (the restraint on the expansion). (We will look more closely at the energy conservation issue in the next section.)

Here, the meaning of the terms “to join” and “to gather” needs to be clarified. The critical point is that the act of joining is not limited to the physical crash of two bodies. Orbiting bodies are also joined together (by the means of gravitational attraction). Additionally, they are subject to the (relativistic) mass increase because of their orbital speeds. Practically, standard metrics and clock-ticks also contract and decrease in gravitational orbits.

In fact, observations that indicate the missing matter in the galaxy clusters simply agree with this paper’s conclusions. The orbiting systems of the stars (galaxies) behave like single lumps, whose gravitational field increase because of the act of gathering. As a result, this phenomenon may be accepted as one of the observable verifications of the Geometric Generalization.

Finally, in the next section, we will examine the perfect universal balance in Nature.