If space is not infinite, then we must live in a bubble or something. What would be outside of this bubble?
603419
We live in a jam jar on a scientist's shelf. They drop in bits of war, anarchy, etc, to see how we react. It's all one big experiment really in someone's living room.
436621
yeah, i guess it could wrack almost anyone's brain.  spacetime is not infinite.  it is finite yet has no edge.  it may be something like the two dimensional surface of a sphere.  nothing inside or outside the sphere exists for the surface.  nothing exists outside the universe or before the universe.  i have something else for you to think about.  the universe is 13.7 billion years old, yet we can observe parts of the universe that are about 46 billion lightyears away.\n\nhttp://en.wikipedia.org/wiki/Big_bang\nhttp://map.gsfc.nasa.gov/m_uni.html\nhttp://www.sciam.com/print_version.cfm?articleID=0009F0CA-C523-1213-852383414B7F0147
11829
On one theory, the space of the Universe (as well as its contents) is what's expanding. That theory says the total amount of space is finite, and that finite quantity just gets bigger every second.  What, you might then ask, is outside of space?  There's no outside!  It's like asking, "What's north of the North Pole?"
58597
Recently, scientists are creating theories that saying there are more universes beyond our own. Until we learn to harnass the power of warpholes, black holes, etc. or send things traveling at the speed of light without damaging it, we may never know where space ends.
601185
Space is the absence of matter, so if the universe didn't exist, there would still be space.
1092455
Yes.  Infinity goes in both directions.  Space is space, large or small.  IMHO  ;-)
1107409
I do not believe you could ever find the 'end' through the knowledge we have today.  This would require us to exceed the speed of light, obtain infinite energy, warp space as a blackhole does, etc.  I do believe there are infinite universes.  Our universe exists as a 'point in infinitely dimensional space.  \n\nOur universe was created from the chaos of the lawlessness of nothingness, we could have been 10 billion times larger in mass or the size or total mass of an atom.  We may be able to difine how much mass the universe has, but possibly never the size.\n\nIt would be like defining the size of a dimensionless point.
90873
Nope, not what my theory says. My theory is as follows:\n\n"...the Universe as many see it, is expanding. Anything expanding must have boundaries. THus, boundaries can be anything holding something, in the Universe, the boundary is space, which is matter. Thus, anything inside something (or something finite) must be rotating."\n\nThe Universe my friend is not infinite, but finite with endless boundaries. It's like a ballon. As you blow air in the ballon, it expands, but there is no boundaries (pretend there is no plastic boundarys). But there is boundaries, because as you blow in the ballon, it is also expanding the boundary, (the air on the outside). The outside air is the boundary.\n\nThe Universe is much mroe complicated, unfortuanetly, but still with the same concept. It is also expanding, and as it expands, it also pushs it's boundary outward (the space outside of it). Space is matter! ANd therefore, the space, or the matter, is the boundary.
1027618
It is quite possible for the universe to be both finite and without a boundary. No wall, but still it doesn't go on forever. Here's a way of visualizing it. Imagine that nomatter which direction you choose, you will eventually get back to your starting point if you go far enough in a 'straight' line. Impossible? Free your mind. It happens in two dimensions on the surface of a sphere. While it currently looks like the universe really is infinite, such three dimensional spheres were models used for finite universes until the data showed they are probably wrong.
79119
Our universe has 4 dimensions of space-time, and the domain of these domains is finite.  However, the expansion of that is in a larger dimensional space--meaning more than our four dimensions, with higher dimensions orthogonal to our four.\n\nThink of the 2-D surface of a balloon.  If you were a 2-D being on the surface on that balloon, you'd have no concept of the 3-D space inside and outside the balloon--your entire existence wouldbe contained on that 2-D surface.  But if the balloon inflated, you 2-D reality would grow in the context of the larger 3-D reality which was beyond you.
474119
Space does not come in particles.\n\nThere is no aether.\n\nQuantrons do not exist.\n\nBut apart from that I'd say you're probably almost right.
594695
The universe cannot have an end, it has to be infinite and completely symetrical. This leads to three possible scenarios for its shape a saddle shape, a spheroid, and a flat plane. Different experiments have led scientists to believe that space is an infintie flat plane. The main reason why we know that if there were edges to space then we would have to me moving towards some objects and away from others. This is not the case as all observed entities are moving away from us. This leads to the assumption of a infinite expanding universe. \n\nAs far as our perception is concerned we are not inside of anything since the universe occupies all of the space that we can observe so the universe is everything. But if somehow you could step out of our universe into a higher dimension you dont know what you would see. There are some theorists who believe our universe is one of many universe. But since there is no way to see out of the universe we may never be able to answer this question. I agree that if you start thinking in this manner it can get quite perplexing\n\nTo the person who said space must have an edge to expand think of a baloon. If we go down a dimension imagine that our galaxy is a penny glued on the surface of a baloon. To us the baloon has no edges at all since we cannot see out into the third dimension, yet the baloon is expanding. So from our vantage point we live on an infinite surface that is expanding and causing nearby pennies to all travel away from us.
554735
space probably does not end.  space-time may be something like the two-dimensional surface of a sphere.  it has no center and no edge.  nothing inside or outside the sphere exists for the two-dimensional surface, and nothing exists outside space-time in this model.
1140209
the spacetime is finite yet has no edge and no center.  it may be something like the two dimensional surface of a sphere.  anything inside or outside the sphere exists for the surface.  nothing exists outside spacetime in this model.  the universe did not begin in empty spacetime.  spacetime began with the universe.\n\nhttp://map.gsfc.nasa.gov/m_uni.html\nhttp://universeadventure.org/\nhttp://www.sciam.com/print_version.cfm?articleID=0009F0CA-C523-1213-852383414B7F0147
415793
possibly its infinite\nbut its an argument you will find quite interesting to discuss with REAL people. im no astronomer but a thirteen year old student.i can tell you that there is the M-theory which states of parallel universes.the string theory says that there is a 12th dimension which is outside the boundary of this universe. Now we ask what is beyond that? its hard to answer. But we should never let our Heads be larger than our Hats!
1033786
this is actually a common misconception about the big bang.  the universe may be something like the two dimensional surface of a sphere.  it is finite yet has no boundary and no center.  nothing exists "outside" the universe.  to quote a dead writer, "there is no there, there".\n\nread this:\nhttp://www.sciam.com/print_version.cfm?articleID=0009F0CA-C523-1213-852383414B7F0147
429398
Well, think this, the universe is infinite. Wouldn't be kind of ridiculous to think we are the only smart ones around in such an endless space?