Well I believe they're infinite. Infinite dimensions, and channels within each of the dimensions, going from denser to light filled, going from more
negative to positive.
In fact, the twin vortex of the electro magnetic universe, in EU theory (Keely, Telsa, Russell, etc) looks like this:
Now the twin vortex, is so close to literal, in a literal interpretation of layers of different dimensions/universes, densities, polarities.
ie. The bottom is a pryamid, the top a challice or inverted pyramid. Realms and dimensions that go lower are monopolies, under tyrants often, the
pyramid system, rank and file, fascism, Love of Power systems.
The Challice or Holy Grail, or Sophia, or Mothers Unconditional Love and Equality, is the inverted postiive polarity, (note mystery schools usually
like to put mother as negative, and black as white, sun as dark, and sweet as bitter). This isnt man and woman, by the way, this is energies
associated with ideas, you can use different language, the division should end in people minds and helping one another ensue.
But, that inverted pryamid, top in the twin vortex, is the Infinite Family and Progression and Equality.
Without children, going through the ropes and challenging themselves in worlds that could best described as inbetween, in the middle, and having a
grounding in the differences, the way injustice and lack of freedom hurts, but also that freedoms are gifts and being selfish hurts, they don't grow
up to the higher levels.
But in infinity there is no higher/lower, up/down really. So these are depcited in a system thusly, but even a more fascist world can be seemingly
higher tech and more empowered than the testing ground areas.