Think of your home. If someone was to ask you where is your home, you would give landmarks, street number and other details to point out the location of your home. Same thing applies to your state, your country. Where is the USA? You will answer- north of Mexico and south of Canada. Are you getting the drift of my discussion? We have reference points for all locations on the earth. Similarly we have reference points of stars in the universe. When we think of the sun as stationary with reference to space, we can locate other stars. Sun is the reference point for locating then. But what about reference point of the universe itself?
If you were to assume that the universe was not infinite but finite and with a shape then you need to get a reference point for that. This provided you think that there are other universes in the space. Where does the boundary of our universe end? What is beyond that? If our universe is part of larger space, then only space must be beyond our universe. Then there should be another universes somewhere else. This brings us to the question- Are we alone in the larger Universe? Is our universe the only one in the larger universe or there are other universes. No clear answer is yet available for this.
Universe is a great mystery. We look at stars and forget to think that there are stars beyond, and more beyond, at distances that defy human comprehension. What are these stars doing there? What lies beyond? It is all a big mystery. The existence itself is a big mystery. A small atom has a nuclei that has protons- all positive charged together, and we have stars that match the forces so very well that everything looks just perfect. Difficult to understand - Go ahead and think.
