If the Universe had no borders than wouldnt the Galaxies ,& ours float away faster then light speed?

Answer 1

Well, nothing says that space itself cannot expand faster than the speed of light (at least for large distances)

Also, consider a ring - its a one dimensional line bent through a second dimension. Does the ring have an edge like a line segment? Nope - it has no boundary for something existing on the line - the one dimensional inhabitant just keeps going in circles. Does it have a finite length? Yes - the circumference of the circle. The one dimensional inhabitant, unable to visualize the second dimension thinks its ridiculous to waste time thinking about a second dimension that can't be seen. The two dimensional observer can see the bend of the ring clearly.

Consider a balloon - its a two dimensional area bent through a third dimension. Does the balloon an edge line a flat disk? Nope - it has no boundary for something existing on the surface - the two dimensional inhabitant just keeps going around the surface never finding an edge. Does it have a finite area? Yes - the area of the surface of the sphere. The two dimensional inhabitant, unable to visualize the third dimension thinks its ridiculous to waste time thinking about a third dimension that can't be seen. The three dimensional observer can see the bend of the balloon clearly.

Now consider a space - its a three dimensional volume bent through a fourth dimension. Does the space have an edge like a soap bubble? Nope - it has no boundary for something existing in the volume - the three dimensional inhabitants (like us) just keep going and going through the space never finding an edge. Does it have a finite volume? Yes - the volume that is the edge of the hyper-space. The three dimensional inhabitant (us), unable to visualize the fourth dimension thinks its ridiculous to waste time thinking about a fourth dimension that can't be seen. The four dimensional observer can see the bend of the space clearly.

Two dimensional constructs have one dimensional edges that are unbounded yet finite.

Three dimensional constructs have two dimensional edges that are unbounded yet finite

Four dimensional constructs have three dimensional edges that are unbounded yet finite (like our universe)

Our universe does not have an edge we can perceive, but it does have a finite, but expanding size - just like the ring and the balloon. The 'boarder' is the boarder of perception. Its 14 billion or whatever years out because it took 14 billion years to get here. We can only see as far as the distance light has been traveling from the beginning. This doesn't mean its not bigger though.... The balloon can be blown up and dots you put on it would all recede from each other - just like the galaxies all recede from each other (generally speaking)

There is an analogy for you - time and space are both dimensions. There may be many more and thinking in purely three dimensions (hard to visualize more I realize) will not leave you with answers that match what science has discovered and proved to date through experiment and observation.

Answer 2

The first part of your "if" question is okay. But, the last part where you say "faster than light speed" is not possible. So on the whole, your answer is not answerable.

I can tell you this, though... The universe that we can see and measure is at least 45 Billion Light Years deep in every direction from us (or rather from the Sun). And, everything in the universe is moving outward at a fairly rapid pace but certainly not at light speed. As far as we know, there is nothing that can accelerate objects of mass to the speed of light...and certainly there is not a force that can accelerate things the size of planets and stars to that speed.

In a vacuum things do not just float off at random. Something somewhere at some time set things into motion (moving). And, since those things are within a vacuum, they kept right on moving until they came under the influence of something even bigger than themselves.
At that time they either joined with the larger object or began yielding to that objects gravitational pull and swung around to circle it (maintaining its former speed of flight), captured by its gravitational force.

Above I mentioned a distance like 45 Billion Light Years.
Beyond that is the unknown. However, the unknown is not a brick wall by any means. We just cannot see things beyond that point. And, strange as we human beings are, we just cannot describe what we cannot see or measure. It is hard for some to accept that fact, and that is why there are all of these questions all the time.

Answer 3

The expansion of space could certainly make things separate faster than the speed of light, if space were expanding that fast (which it's not). Per relativity, things can't travel THRU SPACE faster than light, but space itself can expand faster than light. This is the basis for the Inflationary Theory modification to the Big Bang.

However, none of this has anything to do with your question about borders. There's no reason to think a lack of borders will cause space to expand faster than light, why would it?

Answer 4

there's no such thing as our universe having borders. The gravitational forces between all the objects in the universe is whats keeps everything at a reasonable rate of movement. Also, nothing can move faster than the speed of light...that just wouldn't make sense.

Answer 5

There is some kind of border, even though it is not a physical one that you can touch.

The Universe is expanding. However it is not expanding in a way that carries stuff with it. It is actually the "quantity of space" that is increasing.

We have the feeling that we are almost stopped in relation to the surrounding space (yes, we are moving as a result of our galaxy being attracted by groups of galaxies, but that is nowhere near the speed of light).

When we observe distant galaxies and look at the relation among them, they also seem to be stopped (or going relatively slow) compared to their surrounding space.

However, the space between us and them is increasing becasue of the expansion. Thus the distance between them and us is increasing. Not because we are moving, but because there is more and more "space" between us.

If a galaxy is far enough from us, then the space between them and us will be such that light from the galaxy will not be able to reach us. That is the "border". There may still be galaxies further out, but we will not see them because the space in between is growing too fast.

That border is presently around 14 billion light years. Objects close to that border appear to us to be moving very fast even though they are not really moving locally. If astronomers on that galaxy are looking at us, they also see us as moving very fast, even though we know that we are not.

If the space between us and some galaxy is growing faster than the speed of light, then we cannot see that other galaxy and we would not know it exists. To us, such a galaxy would be beyond the "border" imposed by the speed of light.

Answer 6

No. Nothing moves faster than light speed. And why should they?