Gravitational Permiosity of Deep Space
The abaryonic dark matter hypothesis is critically examined for its manifest weaknesses and defects. It is stressed that although dark matter is one possible explanation for apparent gravitational field strengths otherwise unexplainable by observable matter, it currently lacks direct laboratory evidence. That hypothesis, in particular as regards the sheer relative quantity of dark matter over ordinary matter, is also found to be directly at odds with the much-celebrated ?accelerated expansion? model of the universe --the ?dark energy? hypothesis. Several speculative propositions about dark matter are briefly discussed, from the possibility of simple misreading of the observational data due to other sundry causes, after which the concept of ?gravitic permiosity' is introduced. In this model, increased gravitational effects in large-scale cosmic systems are explained in terms of a pervading property of space itself, analogous to the respective electromagnetic permittivity/permeability, whose topical variation enhances the strength of gravitational fields in deep space in a manner parallel to the action of dielectric and diamagnetic materials on EM fields.