Where does the universe end?
542436
As far as terrestrial scientists are concerned the universe in infinite. It occupies the entirity of our three dimensions, and possible more. If you want to think of a lower dimensional example think of a baloon with pennies glued to it. To the pennies the universe is infinite but if you can step into a higher dimension and observe it it becomes obvious that the universe has bounds. Our current knowledge is that the universe has to be infinite because of the symmetry required and inferred by many formulas. It also has to be expanding, because every object is moving away from every other object. The things we dont know is the shape of the universe. There are 3 basic possibilities. The first is a three dimensional spheroid. This is kind of like a ball but instead of a two dimensional skin there is three dimensions. The second is a three dimensional saddleoid shape. These first two scientists are pretty sure are not the answer since they do not detect any curvature in space. The third option is an infinite plane. There are two ways this plane can happen one is that it is just infinite the second could be some kind of wrapping effect so that if you were to walk off one edge you would show up on the other kind of like a video game screen. \n\nBut to answer your question briefly there is no end to the universe. Our scientific theories prove that the universe must be infinite, symmetric, and expanding
855084
Depends on whether you consider the start of the universe at the end of the atmosphere, or at the limits of the solar system, or the galaxy.
1055543
when the world comes to an end?
674188
well, spacetime does not seem to end, and nothing is "holding up" spacetime.\n\nthe universe is not infinite. the universe is finite yet has no edge and no center. it may be something like the two dimensional surface of a sphere. nothing inside or outside the sphere exists for the two dimensional surface.\n\nalso, i have something for you to think about. the radius of observable universe is about 46 billion lightyears, yet the universe is 13.7 billion years old.
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.
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.
36543
As I understand it, the universe is in fact finite.  However, it's expansion is continuous and progresses at such a rate that we can not, with current technology, move beyond to see the end.
1035265
Which is the end of expanding universe? If any end exists, what will be behind this end?\n\nBefore we can address that question, we must first define universe.  \n\nThe word universe denotes all space and everything (matter, energy) contained within it.  The prefix uni means one.  The root verse means word, carnate message, meaningful substance, matter.  Questions regarding our universe persist today.  Does it have a beginning and end, or does it go on forever and ever?  Is it linear or curved?  If it has limits of length or curvature, then what lies beyond the Universe?  If something lies beyond the Universe, then can’t we accurately call that the Universe?\n\nSome lay people and some scientists conceive of the universe as infinite space.  Others define the universe as finite, or limited (perhaps curved), space.  Still others incorporate the elements of matter and/or energy into their definition of the universe, as opposed to the space beyond matter and energy.\n\nGiven these concepts of our universe, some scientists conclude that the “totality of space could be infinite. Shrink an infinite space by an arbitrary amount, and it is still infinite. (Scientific American March 2005).”  \n\nAs to the notion that we live in an ever expanding universe, moving away from every other universe on the fabric of space-time, some scientists are careful to point out that “\n\nAndromeda, our nearest large galactic neighbor, is actually moving toward us, not away. Such exceptions arise because Hubble's law describes only the average behavior of galaxies (Scientific American March 2005).”\n\nIn accordance with your supposition that our universe is in another universe, “it has been hypothesized by some scientists that the universe may be part of a system of many other universes, known as the multiverse (http://en.wikipedia.org/wiki/Universe).” Modern astrophysicists talk about multiple "pocket" universes that branch off from one another.  Stephen Hawking points out that parallel pocket universes can have no effect on a real observer inside a single pocket, so, according to Hawking, they are theoretical baggage that should be eliminated from cosmology, the study of the origins of the universe.\n\nSome string theories define the universe as a three-dimensional space in an invisible space having more dimensions. This is, in essence, a universe within a universe.  Our zone, a “braneworld” could periodically bounce into another parallel braneworld.  \n\nThis may create what would appear as a Big Bang from one perspective or a Big Bounce of alternating expanding and contracting universe from another perspective.  Such a cataclysmic event is thought to occur 300 billion years from now, resulting in the rearranging and creation of a new universe.\n\nWhich is the end of expanding universe? That may be determined in 300 billion years, when it stops expanding (like a balloon).  If any end exists, what will be behind this end?  A multiverse void containing other expanding and contracting balloons, referred to as universes, may exist beyond our own.\n\nSteve\n:-D
475077
Everything that has a beginning has an end. - The Matrix.\n\nThe only questions are when and how.  The rest is just details.
680741
Well we couldnt go to the end.. because time is what results from the universe expanding.. so as time goes on.. the universe keeps growing
1086035
This question  has been asked before, hasnt it? Sounds familiar.\n\nSpace is never ending, you can leave the Milky Way and you will enter another galaxy, depending on where ure exit point is.
246569
There has to be a Restaurant at the End of the Universe.
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.
558467
Is our universe in another universe?  \n\nBefore we can address that question, we must first define universe.  \n\nThe word universe denotes all space and everything (matter, energy) contained within it.  The prefix uni means one.  The root verse means word, carnate message, meaningful substance, matter.  Questions regarding our universe persist today.  Does it have a beginning and end, or does it go on forever and ever?  Is it linear or curved?  If it has limits of length or curvature, then what lies beyond the Universe?  If something lies beyond the Universe, then can’t we accurately call that the Universe?\n\nSome lay people and some scientists conceive of the universe as infinite space.  Others define the universe as finite, or limited (perhaps curved), space.  Still others incorporate the elements of matter and/or energy into their definition of the universe, as opposed to the space beyond matter and energy.\n\nGiven these concepts of our universe, some scientists conclude that the “totality of space could be infinite. Shrink an infinite space by an arbitrary amount, and it is still infinite. (Scientific American March 2005).”  \n\nAs to the notion that we live in an ever expanding universe, moving away from every other universe on the fabric of space-time, some scientists are careful to point out that “\nAndromeda, our nearest large galactic neighbor, is actually moving toward us, not away. Such exceptions arise because Hubble's law describes only the average behavior of galaxies (Scientific American March 2005).”\n\nIn accordance with your supposition that our universe is in another universe, “it has been hypothesized by some scientists that the universe may be part of a system of many other universes, known as the multiverse (http://en.wikipedia.org/wiki/Universe).” Modern astrophysicists talk about multiple "pocket" universes that branch off from one another.  Stephen Hawking points out that parallel pocket universes can have no effect on a real observer inside a single pocket, so, according to Hawking, they are theoretical baggage that should be eliminated from cosmology, the study of the origins of the universe.\n\nSome string theories define the universe as a three-dimensional space in an invisible space having more dimensions. This is, in essence, a universe within a universe.  Our zone, a “braneworld” could periodically bounce into another parallel braneworld.  This may create what would appear as a Big Bang from one perspective or a Big Bounce of alternating expanding and contracting universe from another perspective.  Such a cataclysmic event is thought to occur 300 billion years from now, resulting in the rearranging and creation of a new universe.\n\nIs our universe inside another universe?  Well, apparently the Men in Black had it right.  Our universe seems to be inside of something else, another universe, called the multiverse.\n\nSteve\n:-D
423943
The universe is basically everything.  The visible universe is the part of the universe that is known to us, it is the farthest we can see and, hence, the farthest we can study.  There may be more beyond this but it is kind of silly for us to worry much about it at this point because it is beyond our reach.\n\nVacuum (I'm assuming that's what you were typing), is supposed to be the complete lack of matter.  If you say that there is a vacuum inside a box then there should be no atoms inside the box.  We say that space is a vacuum but this is really a generalization.  Space is not completely empty but things thin-out the further you get away from the Earth, our sun, our galaxy...\n\nI'm not sure how one creates a real vacuum.  No one really knows how our universe came into existence but we have a very good guess that it started with the Big Bang.  There is some evidence to support this.\n\nHere are two websites that describe it better than I could if you are interested.\n\nhttp://en.wikipedia.org/wiki/Big_Bang\n\nhttp://liftoff.msfc.nasa.gov/academy/universe/b_bang.html
626822
The Universe is expanding, but it doesn't have a phyiscal start, middle, or an end.  It's going to expand forever. Don't think about it, because it's not something our mind can really grasp.\n\nHere's an analogy that helped me:\n\nImagine the Universe as a two dimensional place.  The Universe is the surface of a rubber ball.  There's no start, finish, or middle.  As the Universe expands, the rubber ball fills with air.  Still no start, finish, or middle.\n\nFor a long time, it was unknown whether the Universe was open or closed, meaning whether the Universe would expand forever or eventually collapse back on itself back to nothing.\n\nThe hubble telescope proved that the Universe it open and would expand forever.
82440
There's an interesting question.  Perhaps from the ultimate collapse of the previous universe.