The Gravitational Bohr Radius
  The gravitational Bohr radius (GBR) characterizes the size of a hypothetical ground state hydrogen atom wherein the binding interaction between its nucleus and its electronic structure is purely gravitational. The conventional calculation of the GBR, based on the standard Newtonian gravitational coupling constant, yields an astronomical size for the "gravitational atom". On the other hand, a discrete fractal cosmological paradigm asserts that the gravitational coupling constant that applies within Atomic Scale systems is roughly 38 orders of magnitude larger than the conventional gravitational constant. According to calculations based on predictions of this discrete fractal paradigm, the value of the GBR is actually on the order of 2 pi times the standard Bohr radius. Implications of this revised gravitational Bohr radius are discussed. 
R. L. Oldershaw