Bert wrote,

Both have black holes at their center.
Both rotate. =A0 Galaxies are inside
Universes. But it is like wheels within
wheels =A0 =A0 =A0 =A0 =A0 =A0 =A0

This is where 'intuitive extrapolation' comes in, Bert. A basic planform
is seen throughout nature, at every level.. in this case, dual
hemispheres and a common equator rotating on a polar axis. It's common
to all rotating systems. Using Occams Razor, it's more logical to assume
the macro-universe is also rotating and displays this same planform seen
in all its 'little fractals', than not. That would make the
macro-universe a bipolar toroid, with the hypermassive BH 'Engine' at
its core (Primal Particle). The (ground state) hydrogen atom would
display this same toroidal form, with its electron shell and central
proton the exact microscale analog of the macro-universe.. making the
bipolar toroid the most promal form in nature, from which all else
'fractalizes' and evolves.

oc