Is the Universe infinite?
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.
710329
I hate to be the philosopher but that is why the question still reamins. No one can accuratly tell what lies beyond the boundries of the universe. Is there another? Is it just white noise? I believe that space is infinite and our "universe" could well be a part of a cluster of "multiverses". i was once told that the universe is expanding in the same way that a balloon is blown up. So what lies beyond our universe? I say space, space, and more space! \n\nIf our universe began with the "big bang" then that would mean that at some point the universe had collapsed upon itself, leaving empty space.
334137
the universe is finite yet has no boundaries. it may be something like the two dimensional surface of a sphere.  nothing inside or outside the sphere exists for the two dimensional surface.  nothing exists outside the universe in this model.
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.
1067957
No matter how many 'experts' around here claim that there are alternate universes or other dimensions or a brick wall, nobody--repeat NOBODY--really knows. Tons of theories, but not one single shred of evidence to support any of them.\n\nScientific research has repeatedly indicated that our universe is infinite in scope, and that it will expand forever although its contents (mass and energy) will very, very gradually fade away to nothing.\n\nBefore our universe began, and right now, there's probably nothing else but an absolute and infinite void totally without energy, mass, spacetime, dimensions or anything else.
1083084
The Universe cannot be infinite, because it is expanding, which points to its origin where everything began at the same point, namely the singularity of the Big Bang. Therefore, if it is expanding, it is bounded.\n\nHowever, it is thought that it probably doesn't have an edge, much like the Earth doesn't have an edge. If you started in a spaceship and went in a straight line, you would eventually end up where you started, much like if you started at the North Pole and went in a straight line, you would end up back the North Pole.\n\nThe reason: although you would be going in a straight line on the 2-D surface of the Earth, that line is curved in the 3rd dimension. So, if spacetime is curved in the 4th dimension, you could be going in a straight line 3 dimensionally, but it would be curved 4th dimensionally.
383637
How do you define what a universe is?  I define the universe as everything there is.  Obviously the set containing everything does not allow the existence of something outside of it.  In other words, if you were to show me evidence of another universe I would say that what you have shown me is part of this universe.\n\nBy my definition there can only be one universe.  Do you have a different definition of what a universe is?
333639
What if you were told....there is more then one??? This is TRUTH. The Universe is Creator Source expressing itself in the vastness of ALL time and space....there are universes within universes....CREATOR cannot stop expanding....it is its nature.....so YES.....most definitely........ALL UNIVERSES are INFINITE!!!!! And WE are expanding with it!\nSLEEPERS.....AWAKE!!!!!!\nwww.fromthestars.com\nwww.operationterra.com \nwww.librarising.com\nwww.2012.com.au\nwww.goldennumber.net\nwww.survive2012.com\nwww.prisonplanet.com\nwww.evolutionoftruth.com
1060678
Imagine a situation where you would come back to your starting place no matter which direction you go as long as you kept going far enough. This is true, for example, on the surface of a sphere. But it turns out that there are analogs of this for going any direction in three dimensions. In this case, the universe would be finite (like the surface of a sphere), but would have no boundary (again like the surface itself). This is actually a simplified version of the models used by physicists for describing a finite universe. In reality, the evidence suggests that the universe is infinite.
1059228
If the universe is everything, then what is it expanding into?\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.  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\nIf the universe is everything, then what is it expanding into?  It seems that our universe is all matter, space, and energy that we can perceive in this closed system.  However, that does not mean that there is not additional matter, space, and energy outside our universe.  In other words, there are probably other universes.  Therefore, the zone that we call our universe (or braneworld) may be moving through or expanding into other universes (or braneworlds).  In sum, all universes may be moving through a multiverse.\n \nSteve\n:-D
245031
Yes this is a hard topic to understand the only way I can explain it is to imagine that space "curves" onto itself. Thus is finite.\n\nThe reality is an actual infinity can not exist, its something conceptual, impossible lack understanding of what an actual infinity is, it can exist mathematically as an Ideal, but not in reality as that is physically impossible.\n\nLook at the attributes of infinity:\n\n(1) You can not add to infinity\n(2) Any part of infinity is the same as the entire "set"\n\nWhen we trace our Universe back to the big bang we end up with a singularity, this is where "Science and physics break down" it can not be really explained and we have to go to a higher source of knowledge i.e. theology.\n\nWhat I will end on is saying that one of the Attributes of the Creator is that he is infinite.\n\nI hope that helps\n\nAnhar Hussain Miah
183513
There is disagreement over whether the universe is indeed finite or infinite in spatial extent and volume.\n\nHowever, the observable universe, consisting of all locations that could have affected us since the Big Bang given the finite speed of light, is certainly finite. The edge of the cosmic light horizon is 13.7 billion light years (4.19 Gpc) distant. The present distance (comoving distance) to the edge of the observable universe is larger, due to the ever increasing rate at which the universe has been expanding; it is estimated to be about 78 billion light years (7.8 × 1010 light years, or 7.4 × 1026 m). This would make the comoving volume, of the known universe, equal to 1.9 × 1033 cubic light years (assuming this region is perfectly spherical). The observable universe contains about 7 × 1022 stars, organized in about 100 billion galaxies, which themselves form clusters and superclusters. The number of galaxies may be even larger, based on the Hubble Deep Field observed with the Hubble Space Telescope. The Hubble Space Telescope discovered galaxies such as Abell 1835 IR1916, which are over 13 billion light years from Earth.\n\nBoth popular and professional research articles in cosmology often use the term "universe" when they really mean "observable universe". This is because unobservable physical phenomena are scientifically irrelevant; that is, they cannot affect any events that we can perceive. See also Causality (physics).
689891
it's called infinite.\nIt never began and it will never end it always has been and since it was thought up by man it's infinitivity can't be described because it's not there to the universe bu only to us since everything to us has a begining and an end but the universe will always be. this may sound onfusing but that's because the thought of infinity and the universe and time is only slightly comprehendable to the human minde, anything past 9 planets, 1 sun and space is just...confusing!
311305
how do you understand anything?  We can't understand everything there are things beyond our comprehension.  Try to think about this, does space end?  Is it infinte?  what is infinite?  You kno?
333265
There's The Universe, then there's the observable universe. No one knows the size of the first one; it's probably infinite. The second one is the universe with a boundary; that boundary is how far we can see into The Universe, about 13.7-billion light years.
4683
You're assuming that the universe extends for infinite.\n\nOf course, if you're assuming that it has meaning, does that mean that it has intelligent design? And therefore, an intelligent designed?\n\nIn other words, no.
516526
if we say its size is limited . then what will be beyond the universe . and if we say its size is unlimited . then how can we explain this . the space and the time are very difficult to understand . that is why some says that the only thing real is GOD . the whole other things are only an imagined thing created by GOD . like a dream . but you must know that even the dreams have some being of some kind . if a dream is not exist . then how can we see it .