QGD predicts that black holes are extremely dense but not infinitely so. Considering that are strictly kinetic and that no two can simultaneously occupy any given then . It follows that or, since is the fundamental unit of space, we can simply write for the minimum corresponding radius .

For the radius of the black hole predicted to be a the center of our galaxy, and where the mass is expressed in and radius in . Though converting this into conventional units requires observations to determine the values of the QGD constants and , using relation between QGD and Newtonian gravity, we also predict that the radius within which light cannot escape a massive structure is where is used to represent the gravitational constant. Since the Schwarzschild radius for a black hole of mass is then .

Using to calculate the angular radius of the shadow of Sagitarius A*, the black hole at the center of our galaxy, we get arcsecond which is about 10 times the angular radius calculated using the Schwarzschild radius which i arcsecond. This prediction will be tested in the near future by the upcoming observations by the Event Horizon Telescope.