Re: is there anything above us or is everything on a horizontal plane?

DW, there's really no "preferred direction"
in space: earth's equator is on its own plane, of
course. And the average plane of the solar system
in turn lies "tilted" at a 23 or 24 degree angle to
Earth's equatorial plane. The average central plane
of the Milky Way in its turn is tilted by some 50
or 60 degrees from the solar system's plane. And if
there is any symmetry which can be assigned to the
Local Group of galaxies which the Milky Way lies in,
or to the Virgo Supercluster which the Local Group
is a piece of, then the orientations of all those
symmetries are certainly independent of one another!

So in the end, there really is no way to say "which
end is up" in this Universe of ours. :)

Take care!