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 as a minimum value 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.