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Dark Matter is a form of matter which is thought to account for approximately 85% of the matter in the universe and the remaining is made up visible or baryonic matter. Its presence is implied in a variety of astrophysical observations, including the gravitational affects it has on the orbits of stars in galaxies which cannot be explained by accepted theories of gravity unless more matter is present than can be seen. The reason it is called dark is because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect or emit electromagnetic radiation, which is why it is difficult to detect.
However, we DISAGREE that A VAST MAJORITY of it cannot be explained by the accepted theories. This is because Einstein defined gravity in terms of the “depth” of an energy or gravity well in the “surface” of space-time caused by the energy density of an environment and NOT on the existence of visible or baryonic matter. This means the energy of electromagnetic fields, photons and all other forms of energy along with that associated with visible matter that contribute to its energy density must be taken consideration when gravitational potential.
This suggests the reason it does not appear to interact with an electromagnetic field is because a large part it MAY BE made up of one.
The observation electromagnetic energy prevents the visible matter in stars from collapsing to a black hole or falling to the bottom of its gravity well supports this conclusion because it tells us its gravitational energy MUST BE oppositely directed with respect to that of visible matter.
Some might say, if that if true it should along with the visible matter have an effect on the orbits of planets. The reason it DOES NOT is because creates an offset in the gravitational field of a solar system which would be equal to the energy it provides
One can understand why by using an analogy of the potential energy of water in well where its level represents the gravitational potential of visible matter and its depth represents that of electromagnetic energy which as was mentioned earlier keeps a star from collapsing to a black hole. Putting it another way the offset created by the water is keeping the surface of its environment from sinking to the bottom. This is analogous to how electromagnetic energy is keeping the “surface” of the space-time environment of a star from sinking to the bottom of its gravity well. This means the energy of the water at its surface would be defined by its level not from its bottom but from its surface. But to determine the total energy contributed to is environment by the water one must add the energy content it has below its surface to the how far that surface was below the top of the well.
As was mentioned earlier Einstein defined gravitational potential in terms of the “depth” of an energy or gravity well in caused by the energy density of an environment
However, as was also mentioned earlier the “surface” of space time that defines the gravitational field of a solar system would be offset by the electromagnetic energy that prevents its visible matter from collapsing to a black hole. Therefore, similar to the well one would define the gravitational potential acting on an object orbiting a star from where that offset is in relation to it and not from the bottom of of a stars gravity well.
Yet, to determine the total gravitational potential contributed to the space-time environment by a star one must similar to the well add gravitational potential caused by the energy density of its electromagnetic energy to that contributed by its visible matter.
This means according to Einstein the total gravitation potential of the universe must be at least TWICE that contributed by the visible matter of a healthy star.
The remaining Dark Matter may be contained in black holes or interstellar dust particles. However the fact we can UNEQUIVOCALLY determine how much of it locked in HEALTHY stars WILL help us determine if they are enough account for it or if not we have to less obvious sources.
For example, electromagnetic energy not only contributes to the gravitation potential of stars as was shown earlier but also to creating it in the interstellar space is moving through. Granted the energy of one unit of electromagnetic energy may not contribute much but in large enough numbers it may make up a significant portion of dark matter.
It should be remembered; Einstein defined the depth of a gravity well in space in terms of the ABSOLUTE value of its energy density. Therefore, to determine the total gravitational potential of both dark and visible matter one must include all forms of energy to determine its value.