Question: what is at the end of the universe?

Daniel Parsons answered on 10 Nov 2014:

Wow…what a question! It is a bit far away from my area of science, but i will tell you what I know (or think!)
There are a few possible shapes to the Universe. Some people think that the Universe is like a big balloon or sphere. If it is this shape then the Universe is called “closed” – it is limited in its size but does not have a boundary, just like a balloon. In a Universe of this shape you could, if you had time, fly a spaceship right the way around the inside of the balloon and get back to where you started from.
The second possibility is that the Universe is pretty much flat. This kind of shaped Universe can be imagined by cutting out a piece of a balloon and stretching it with your hands. The surface of the material is flat and not curved. You can expand and contract it by tugging on either side to make it bigger or smaller.
In both cases the Universe has no physical end to it as such!
In terms of the end of the Universe in time…well again, no one is really sure, but we know it is expanding and some people think it will just carry on doing that until all the fuel in all the stars runs out. But that is not going to happen any time soon!