Understanding Dark Matter

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"Understanding Dark Matter"
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Observations of the differential redshift of galaxies leads to a value for their rotational velocity. Gravitational theory of the distributed stars orbits indicates that these rotational velocities are too high to keep galaxies bound together by gravity alone. Scientists assume that galaxies are stable structures over time and are not flying apart due to rotational forces. Because of this assumption, it is postulated that some form of extra matter must be present in the galaxies such that there is enough gravitational force to hold the galaxies together. This matter has not been observed. Because this matter is not observable, it is called dark matter. It is important to remember that dark matter is a theoretical construct to explain the supposed stability of galactic structures.

Perhaps scientists should make observations on galaxies to determine the radial velocities of stars in the spiral arms. All the data I have seen is of rotational velocities, and this does not determine an orbit. If stars are spiraling away from the galactic centers, the concept of dark matter is not needed. If there is some effect on galactic dynamics due to the finite propagational speed of gravitational forces predicted by general relativity such an effect needs to be investigated theoretically. There are many unknowns in astronomy which must be filled in by estimation. The number of stars, their masses, the amount of matter in nebulae, the quantity of interstellar dust and rubble, these are all estimated numbers. Astronomy is not an exact science, it is an observational science, and when observations do not make sense with theory, the only course is to make more observations.

It is postulated that dark matter makes up 90 percent of the matter in the universe. This is a bold claim, in that dark matter in theory cannot be observed. To explain an observation with an unobservable construct is a poor excuse for science. Science deals with observable facts of nature. The concept of dark matter is little more than a myth made to explain a defective theory. A scientific theory would be one in which an observation of galactic velocities too great to remain bound in a stable structure indicates that galaxies are not stable structures and are flinging off stars into intergalactic space. As galaxies have not been observed for the billions of years of their estimated lifetimes, this would be a hard theory to disprove if observations of the radial velocity of stars in a galaxy indicated it was correct.

Another theory which does away with the need for dark matter is plasma cosmology. In plasma cosmology interstellar electromagnetic forces are proposed which are more powerful than the weak force of gravity. Magnetic and electric forces operating between stars in a galaxy might provide the binding energy which keeps stars together in a stable structure. Plasma cosmology makes some absurd predictions about how stars form and are powered, so it is perhaps not the best theory of galactic dynamics, yet, it does not propose mystical theoretic constructs like dark matter and dark energy to explain observed facts.

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