How do you think about the space? Is it really infinity? Why? I don't think. Everything has its limit.?
412853
First off you have a real good question.  As a matter of fact I used to think like this during my high school years.  \n\nInfinity in cosmology\nAn intriguing question is whether actual infinity exists in our physical universe: Are there infinitely many stars? Does the universe have infinite volume? Does space "go on forever"? This is an important open question of cosmology. Note that the question of being infinite is logically separate from the question of having boundaries. The two-dimensional surface of the Earth, for example, is finite, yet has no edge. By walking/sailing/driving straight long enough, you'll return to the exact spot you started from. The universe, at least in principle, might have a similar topology; if you fly your space ship straight ahead long enough, perhaps you would eventually revisit your starting point.\n\nIf the universe is indeed ever expanding as science suggests then you could never get back to your starting point even on an infinite time scale.
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.
1025562
My opinion through many meditative thoughts:\n\nI believe our universe exists as a point in what you call 'the void'. A point having the geometric meaning of no volume, dimensionless.\n\nI believe what you are considering the void is what I call space. Our universe is what we can view, touch and explain through science we have developed. Space on the other hand is an infinitely dimensional medium, in which our universe was born. \n\nOur universe is nothing more than a 'disturbance' in space, and in space our universe exists as a point. This point is a fraction of infinity, yet everything is a fraction of infinity. So in the humble realization that we are nothing (a fraction of infinity), we realize we are equal to everything we can fathom, as it too is a fraction of infinity no matter how large.\n\nSo, through the realization that we are nothing comes the discovery that we can be equal to as much as we can fathom. \n\nI believe this means everything that makes up the universe and space has its own existence or presence known to space and must exist.  This existence holds true for our universe and what we would consider other universes. The disappearance, or non-existance of any defined object and its position in space no matter how small, down to a point, would truly have mind boggling consequences. \n\nIf time travel is possible than there must be alternate universes, as we know it.  It is a deadening thought to ponder.  Almost pointless until we figure out gravity, which I believe will open the door to all other understandings.
880821
This is an odd question because we are treating ininity like a number. Half of something going to infinity is still going to infinity. There are ways to count different infinities -- there are countable and uncountable ones -- but dividing by 2 does not make a difference.\n\nMy advice is ignore the half infinity for this reason and treat it as a particle in free space. This is common answer which can be found in all text books. The way to approach is take a finite square well and find the condition as we increase the boundries to infinity. They will be the same answer -- namely a free particle in space.
468467
There is no boundary as such because there is "nothing" beyond the edge; but the Universe in not infinite.  Difficult to get your head around I know especially as "nothing" in this case does not mean nothing as you understand it now.  If I go on you might blow a fuse so I will stop there.\n\n[re: above - "The Milky Way" is the name of our Galaxy not our Solar system]
694295
infinity and beyond . . .DUN DuN dun . . ..
398088
I asked that question to Dr. Brian Greene, author of "The Elegant Universe".  His answer was "the Universe is continually expanding", and therefore, you can't put a size on it.  The Universe, in a sense, CREATES the space it's expanding into.  It is all-encompassing.
710476
Outside the space there is more of Space\nSpace is Infinite
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
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
641539
there is no dimension to the universe, its infinite. the horizon never ends either it keeps moving with you. its around 25 miles away depending on where you are. Its as far as you can see because of the curvature of the earth.
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.
592848
Basically, the space that you and I experiences daily is 3 dimensions: up/down, left/right, forward/backwards. But space doesn't have to be 3 dimensions. It can be any number of dimensions. Of course, it is very difficult for us 3-dimensional beings to imagine what these dimensions are, or where they are. The problems is that we can NEVER see the fourth spatial dimension, never mind the 5th or the 6th, etc. etc. Let me explain why.\n\nImagine for a moment that we are 2-d beings, not 3-d. And we live on the surface of a sphere (like a ballon). This sphere is our universe. Everything we see, touch and experience happens on the surface of this sphere. We can go left/right and forward/backwards. But we can never go up or down. When we travel in one direction, we will eventually circumnavigate the sphere and make a complete circle, which brings us back to the initial starting point. If we ask the 2-d beings to imagine 3-dimensional space, all we can tell them is that the 3rd dimension (up/down) is orthogonal (a fancy way of saying perpendicular) to the surface of the sphere.\n\nThis is exactly our situation when we talk about the 4th, 5th, 6th, whatever nth dimension. They are defined as the dimension that is orthogonal to the n-1 th space. So the 4th dimension is orthogonal to our 3-dimensional space, and the 5th dimension is orthogonal to the 4-dimensional space, etc. etc.\n\nNow about Super String Theory and these higher dimensions: what the theory predicts is that our universe does indeed have more than 3 spatial dimensions. Some version sof the theory say there are 10, some say there are 11. Whatever the number (it doesn't really matter in our discussion here), these higher spatial dimensions are currently curled up into very very tiny spaces. So what does that mean?\n\nWe now go back to our 2-d being living on a sphere example. For the time being, let's say we are now on a flat 2-dimensional surface (like a sheet of paper). Super String Theory says that the higher dimensions are curled up. So let's consider in our case the 3rd dimension as the curled up dimension. This means that if we were to magnify any point on the 2-d surface all the way to about 10^-35 meters (Planck Length), we will see that there is a tiny loop (like a loose thread on a knitted sweater).\n\nNow imagine if our 2-d being were (1) small enough to see and fit inside the loop, and (2) able now to travel in the 3rd dimension, then for it to go in the up/down direction, the 2-d being will now be just going around in circles inside the loop. Remember in the previous case, our 2-d being can travel in one direction on the surface of the sphere and then return to the same point. Well, here our 2-d being is traversing through the 3rd dimension, except that there is no up and down because the 3rd dimension is "curled up" into a loop. So the 2-d being just goes around the loop in circles.\n\nIf you understood the above, then now we can answer the question, what and where are these higher dimensions in our universe. They are culred up in every point in our 3-dimensional space, and if we were small enough and we could move into these higher dimensions, then we would be moving through these very convoluted curled up loops, but not really able to go anywhere.\n\nBecause these higher dimensions are curled up into such tiny tiny loops (remember 10^-35 meters), only the most elementary structures like "strings" are affected by them. The size of these strings are of course on the order of 10^-35 meters long, and can traverse through the curl up dimensions. When the strings vibrate, the vibrations in the 3 large dimensions don't have any effect, but in the curled up higher dimensions, the vibrations can create resonance like playing a musical note.\n\nThese resonances are the stuff of reality, meaning these vibrational resonances of the strings inside the curled up dimensions is what creates matter and energy and thus everything that&#
475057
Space time is the total of all demsions.  They as you may know are height, length, depth, and time.  Time is the fouth demsions because things take time to move.  However time an dspace are theorized to be somehow related.  In this case they would have similar measuremants becuase of that relation.  We can't truly define time, or space.  Space could be infinite and that the universe just sits in it.  Time could also be inifite and yet everything we know as time could just be an event in it.  Humans set a try finite number to infinity sometimes, hence it's given the name the name the "limit".  There's always more to find in this vast, endless world of ours, but all those things will definitely not be found in our liftime.  Maybe, if you believe in this, we'll see the human race find the answers while the rest of us are in heaven.
1022327
The place we call 'space' is very much 'infinite'? To understand it can't be done. Logically and or by dictionary terms it means boundless, endless or very great. Their are many ways to describe the word infinite because the word holds a question of uncertainty. So people try to answer the best they can because really, deep down we don't know the true answer. And all things not labled, catargorized or can easily be explained is scary and is alien to us. The unkown is a scary place for most. Whats after infinite? How can something possibly go on and on with no end. I was once told "Their are new things that are being discovered every day because we as humans where meant to discover them, but then there are things that are so big and boundless that are mind can't even comprehend and thats because the answer lies with god and we will never know. You will drive your self crazy trying to understand the true concept of infinite. But remember this, the most intelligent scientists in the world can only answer your question with a text book answer with a scientific veiw point and still not answer your question completly.\n\nTo answer your second question. God can't be explained you have to discover him for your self and only then will you be able to discribe him. He is so unique that one word can't possibly sum him up. You would need the worlds dictionarys and pick out all the best words that are good and then create another million before you even get close. The true answer to your question lies with you in your heart. Good luck and god bless.
615823
The Universe is thought to be 'finite but bounded'. That is, it does not come to an end anywhere but somehow loops around again far, far away. Another example of a finite but bounded shape is the surface of a bubble, a sphere. It has definite area and size but there are no edges to its surface, no place to call a "beginning" or "end" that is not arbitrary.
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?