There are several variations on the definiton of "Universe". It varies from its earlier definitions in 1589 of: "the whole world"; in 1630: "the world as the abode of man or as the scene of human activities"; and in 1742: "the inhabitants of the earth; mankind in general". The definition changed from the universe being the world to the more modern definition based on a greater understanding: "the whole of created or existing things regarded collectively; all things, including the earth, the heavens, and all that is in them, considered as constituting a systematic whole", or more simply: "everything that exists everywhere."

It is said that the Big Bang created a huge black void containing only trace amounts of hydrogen and helium for the first 100 million years of its existence until the hydrogen clouds collapsed and ignited. After billions of years the temperature and density of helium had increased enough for helium to follow in hydrogens footsteps and create carbon, oxygen, neon, and magnesium. As the temperature and density increased further the star becomes know as a supergiant, carbon and oxygen created the elements up to calcium. Once all of the energy of the star had been used up, the core collapsed, breaking up the larger atoms into neutrons and protons, then this star explodes in a supernova, forming heavier elements and spreading them throughout the adjacent space.

With the exception of the Big Bang, this process is repeated over and over. It eventually lead to the universe filled with stars and solar systems as we know it today. The planets being created over time by the contraction of the debris orbiting a star. And of course all of the living organisms within it evolved as molecules became more complicated within specific atmospheres.

That description of events is simplified, but how is it that the Big Bang only created the lightest elements while the heaviest elements are considered to be created by supernovas? Couldn't The Big Bang have created the heaviest elements as well? Without knowing what existed before the Big Bang, no one can really answer that. Was the Big Bang similar to a supernova, but on a larger scale? In other words, was the point of origin simply a collapsed core from a previous, immense energy source which burnt out?

Now onto the topic, how is it possible for there to be a limit to the extent of the universe?

When I first heard that the universe is expanding I found that to be a difficult concept to accept. If our universe is expanding, then there must be something beyond its outer limits. If that were true, then it may be possible for there to be another universe beyond the edge of and completely separate from ours. Why not? If our universe formed from a single point within nothingness, then why could that have not occurred more than once?

When scientists state that the universe is expanding, it is quite likely that what they mean is that its visible matter is spreading out from its centre. (How can a limitless universe have a centre?) The "expansion" of the universe could simply be caused by the stars at the outer edge, of what they consider to be the extent of the universe, becoming old enough for their light to reach earth. So, the universe may be infinite, we are just limited by the speed of light as to how much of it we can see.

This all seems to suggest that our "known universe" is the oldest part, therefore it must contain the point of origin. However, this is not necessarily true. At a great enough distance it would take light long enough to reach earth that it may be older than our known universe. If the universe was created far enough away outside of our known universe then could it be possible that we may get to see the Big Bang occur? If the Big Bang occurred more than 15 billion light years away, then it is possible. It would mean that the Big Bang had enough force to push matter into our part of the universe more than 15 billion times the speed of light, which may seem impossible, but in a infinite universe it may be possible.

In order for this all to work, one of two things needs to be true, either infinity is possible or the universe is limited. I find both concepts difficult be believe, but I also find it easiest to believe them both rather than just one of the concepts. In that case, our universe is limited but it is contained within infinity. Which means that other universes would likely exist within this "Omnis" infinity.