Solar system, Local System, Constellation, Local Universe, Minor Sector, Major Sector, Superuniverse, The Central Universe and Paradise Isle.
There is no outside as such. The grand Universe is infinite.
In the grand universe of universes, there is no edge or end.
The present days telescope are simply not technically so advanced that they are able see the edge of an expanding and contracting universe even if there was such one. Initially, it is a cosmic fact that the master universe expands and contracts.
We do not know the actual mechanism of space respiration; we merely observe that all space alternately contracts and expands. This respiration affects both the horizontal extension of pervaded space and the vertical extensions of unpervaded space which exist in the vast space reservoirs above and below Paradise. In attempting to imagine the volume outlines of these space reservoirs, you might think of an hourglass.
Isle of Paradise = Center of eternity and residential area of the Universal Creator and closely related equals, such as Ithe Infinite Spirit and the Eternal Son (The Trinity). Many other perfected celestial beings of various orders and class also have their habitation in close proximity to the Isle of Paradise.
Keep in mind that all types of universe energy, force, gravity and other basic circuits of powers all have their origin from nether Paradise. The universes of time and space circulate around the central core of eternity.
There cant be time without eternity. And there cant be infinite eternity without time. The universes of time and space occupy the outer area of eternity (think of it as a disk) and beyond and surrounding the universes of time and space, with eternity an center, there circulate at present 4 gigantic huge outer space rings, containng trillions upon trillions of uninhabited galaxies. All are a slowly transforming stage to be prepared for future habitation.
As you may understand this respiration is of such a scale and designed in such that stability, control and balance is maintained forever.
The nuclear cosmic centre, point zero of eternity, (so to speak) the Isle of Paradise are the cosmic generator of all true energy, gravity and force. This Isle of Paradise, cant stop and has never begun. So the flow, the stream of energy, the many various circuits of ultimatons and all other electrochemical energies, all kinds of gravity circuits and many unknown force are in constant flow from lower part of Paradise, out into all space, in a circular manner. (like a turned upside down spring water) It moves into space in all directions, in certain celestial control m going through several transformations, changes and other transcending mutations only later to return back to Paradise, streaming in and down from above.. Picture a torus, where the energy stream out underneath and make a huge curved journey into space and time to return back coming in from the top going down into the torus.
There is no increase or decrease of energy density, only it go through various integrated transmutations. If any increase or decrease was a fact, the speed of breathing would be effected, causing the gravity circuit to speed up/ slow down the movement of all physical matter. From galaxies to neutrons and electrons and this would cause havoc in all inhabited space not to mention chaotic turbulences and violent eruptions in all circuits , both in eternity as well as in all outer space levels.
For further insight and understanding, I suggest reading The Urantia Book from which the wisdom above is taken