Einstein's closed yet unbounded universe is the surface of an hypersphere or 4 dimensional sphere. If we look out into space we are looking around the hypersphere circumfrence so to speak.
The hypersphere has an opposite side to where we are at. I see that this means that we are looking at the back side of galaxies that we see in the opposite direction in the sky(on the hypersphere.) This is hypersphere lens.
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