When everything was initially created, there was initially only a single Universe. But as Time progressed, there was an interest in creating more Universes. The creation of different Universes would allow for the use of different sets of Physical Constants; it would allow for the Life Construct to use other kinds of materials (or elements) in the creation of different forms of Life; it would allow for other Life to exist that would be incompatible with other forms of Life; it would allow Time to be interpreted in a different manner; other Universes could be used as Experimentation hosts – the list goes on and on.
So where are these other Universes located? Some are beyond the edge of the Universe that we currently occupy; some are in the same physical Space, but the Energies of the different universes are “out of Phase” in a manner that prevents one of finding or being interfered with by another; and others are located in other dimensions. All of the different Universes have been “mapped out” by the Leadership of the Space Construct, and all Universes are “reachable” from the Central Sun. There is a finite (but constantly changing) number of Universes, currently numbering approximately 100,000 distinct Universes.
All Universes were created under the requirements of the Constructs, and are locally governed by a Council of Souls that was determined by the Soul Energies of that particular Universe. There is a Governing Council at the Central Sun that addresses any and all interactions between the Universes that may be needed.
Not all Universes have a complicated structure, like our current Universe does. In fact, the Universe that you exist in now is one of the most complicated Universes in existence. It has far more Physical Space allocated to it than any other; it has a greater number of dimensions that any other Universe; it contains a greater variety of Life than any other; it has other Universes “associated” with it in a way that provide for the possibility of things created under the Life construct to seamlessly move from the current Universe to another Universe in order to exist on a different Timeline, at least on a temporary basis. In total, this Universe has 5 different Universes directly associated with it.
While the First Iteration only contained a single Universe, the concepts of more than one Universe allowed for a Multiverse to be formed at the initiation of the Second Iteration. Still more were allowed in the Third Iteration. The number of Universes fluctuates up and down, depending on the need for another universe. Many Universes serve as a platform for experimentation y those from the Central Sun, and in some cases Souls from another Universe. Universes have no set size; they can appear to be nearly infinite, or they can be as small as the head of a pin. They can be maintained in their own Space, or they can exist exclusively within the confines of another Universe. There is no requirement for a minimum physical size with respect to the Energy within a Universe; there are very small Universes that contain far more Energy than a Universe that is thousands of times their size.
Most Souls are unable to detect or sense another Universe, principally due to their own limitations at sensing adequate Energies around them. In most cases, there is no practical reason to be able to sense another Universe – they are difficult to get to, it is not possible to move anything between the Universes, and it may be difficult to communicate with another Soul in another Universe.
So why a discussion about other Universes? The Creators of All that is, as a part of their work, did look at many other possibilities to make creation something that Souls would enjoy and want to be a part of. The creation of other Universes, all with other kinds of characteristics, were considered an integral part of that process. Other Universes do exist, but perhaps not in the quantity that current Terran Science would believe there to be.