The conventional concept of a Black Hole is based almost entirely on their concept of gravity yet they have no description of what gravity is or how it works. They only have descriptions of what they perceive are actions of gravity. The other half of their Black Hole concept is based on Einstein's THEORY of Space/Time curvature which I regard as pure fantasy. Keely's definition of gravity makes far more sense than anyone else's ideas or definitions of gravity:
"Gravity is an eternal existing condition in etheric space, from which all visible forms are condensed. It is inherent in all forms of matter, visible and invisible. It is not subject to time or space. It is an established connective link between all forms of matter from their aggregation. Time is annihilated by it, as it has already traversed space when the neutral centers of the molecules were established. It is nothing more than an attractive, sympathetic stream, flowing towards the neutral center of the earth, emanating from molecular centers of neutrality, concordant with the earth's center of neutrality and seeking its medium of affinity with a power corresponding to the character of the molecular mass." [John Worrell Keely, circa 1886]