Smashing through the fabric of space, these dense phenomena obtain their massive gravitational effect through their accelaration. They may be the fastest-moving objects in the expansion of space, out-running even light particles in a sense. Not even light can escape their gravity.
This may be a bold assertion, but I think it is simply an extension of particle physics to astrophysics. In the realm of particle physics, scientists predict that they can create blacks holes by smashing atomic particles together at near light speed. In other words, black holes will be created by matter moving through space.
I think this idea is consistent with Einstein's equivalence principle --- that the force of gravity is equivalent to the force of accelaration. Or as I think of it, a physical law should be universally true. But I am no Einstein; I'm just a lawyer.
