>Outer space does not exist.
because it's above and within the center?
>The depths of hell are below. The heavens are above. Sky, water above the dome (firmament) and high heaven above that.
Not quite.
Hell, in scripture, is called "outer darkness" because it is dark underneath the surface as anyone who has been in a cavern knows, – and because it is located "outer" or away from the center Paradise or Heaven of this earth. Many who have died and are medically resuscitated report that after leaving their bodies, they are taken through a dark tunnel through the earth's shell and then come out in brilliant light in Paradise in the center of the earth.
Thus, the scriptures describe a hollow spirit world, with Hell located down in the earth's shell, and Paradise in the center or "heart" of the earth in the "lower parts of the earth" separated by a "great gulf" of space. And since the spirit of all living beings have the same shape and form as their physical bodies, the physical world must also be hollow with a central sun.
The scriptures describe a concave earth model, within us living on the inner surface of the cavity of earth, with the heavens above and within the center. Not flat earth.