What happens at the edge of space?

When I was a teenager (I am now 64 years old! ;-) I remember thinking about the "edge of space" and when reading about the Big Bang, I couldn't understand why half of the sky was not black. Space must have a center from which we expand and in that direction ... there should be nothing, right?

Then one day I understood with this metaphor: Imagine you are a fish swimming in the ocean of a planet without continents. Wherever you are, you will always be at the center of the ocean, right?

Likewise we can only observe the universe in both space and time and the past is a sphere around us! Wherever you are, you see the universe as being at its center. But it doesn't have a center nor an edge. We simply can't have a cartesian representation of the universe. Consider this:

You have certainly seen drawing of the expanding universe as a cone where the summit is the big bang, right? I know propose another drawing where we are at the center of a sphere and its surface is the big bang!

Which drawing is correct? Well, they are both correct. We simply can't draw on a piece of paper space-time.

Yes, the universe may - and probably is - bigger than what we can see. This is called the universe horizon. There are two of those, the past and the future one.

The past horizon is about things that have moved away from us so fast, due to the expansion, that its light doesn't reach us anymore. The future horizon is about light that hasn't reached us yet.

From what I understand, when you get to the edge of KNOWN space you are given a choice to enter unexplored space. This is when the Genesis content of the game kicks in. Is that what your asking?

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If the universe is the same everywhere - as stephen hawking says it must be to make calculations relevant -then light (or you) can't reach an "edge" because an edge would be different from the rest of the universe! On the event horizon of a black hole the

kinetic energy of a mass = potential energy and this is the same for the furthest distance light is from the Earth - using the Newtonian idea that the universe is a sphere.The universe isn't a black hole, this just shows that the universe is like a black hole in that it won't allow a mass to escape from it.

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There is also a grave gap missing as to how the Strong force caused the expansion, and as to how truly large it is.

There is to much unknown for anyone to give definitive answers. From what I've gathered as well is that scientist don't like to go there because when talking about numbers to describe the size as it would seem the Strong Force has done.....a Google is like 1 in comparison and a Centillion is 2.

Well, as the others said, there probably is no center or edge to the universe, and if there was one, we will probably never find it or be able to reach it.

But, propose that there is an edge, and on the other side, is an alternate universe. What would it be like there? Would there be any new colors? Would planets be shaped differently? Would same laws such as gravity and force and inertia still apply?

Thats the biggest question out there, "How big is the universe!?", but we will never know.

There are two ideas on that.

The universe has no boundary, and every point in the universe is the center of the universe.

That is for a finite but unbounded universe.

This is the mainstream view in the big bang theory.

But cosmologists are not sure it is correct.

There are very few things that are known to be 100% true.

If the universe is infinite then we really don't know if there is an edge, or if galaxies just continue on forever.

there may be an end or edge of area as scientists years in the past sent out a sign into area which acts like a ripple in a pond if a stone is dropped in it. that's stated that the ripples over the years have have been given bigger and slower for this reason coming to an end/part. I heard this thought on television and became hard to understand before each and every thing yet rather a only thought. They stated if there became no part/end then the ripples/sign could of carried on on a similar speed and length.

This is a question that mankind have been trying to resolve for centuries. From now we cannot define what is outside, beyond, before, or after our universe because these concepts are only known to apply in the space-time universe itself.

We will never find out even if we make a space ship that travels at speed of light our lifes will be to short to gt to the edge alive+it's always expanding(like a slow mow bomb)

This documentary may enlighten you...

http://www.youtube.com/watch?v=YfE7doPzm5I

...the universe may not be expanding at all.