had a thought. suspect that i am wrong but not sure where. no idea of the maths involved but suspect As an object approaches the speed of light relativistic forces come into play – effecting time dilation density etc Can the same theory be rearranged to show that As you approach the density & time dilation involved at the event horizon of a black hole the conservation of angular momentum would accelerate any rotating matter to the speed of light? If this is true could the event horizon of a black hole become an extremely narrow ring? Circling its own common center of gravity – material approaching the speed of light at the same time that it forms an event horizon? If an object of this type existed could they reach galactic sizes ? Could its diameter, density, rotation, frame dragging of such an object account for the observed effects associated with dark matter ?