What other dimensions are there after the first 4 (space and time)?
89075
Our universe consists of four dimensions: three of space and one of time.  This leads many people to think that the "fourth dimension" refers to time, and higher dimensions must be associated with something else.  That isn't true.\n\nTheoretically, there is no limit to the number of possible dimensions, whether spatial or otherwise.  Another universe might have six dimensional space and two dimensional time, for instance.  We can't imagine such a place, but using math, it's pretty easy to describe its properties.
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.
332409
Our universe has 4 dimensions: up/down, back/forth, left/right, and time. According to well established theoretical physics, it is likely that our universe has more than 4 dimensions and could have as many as 11 (according to String Theory). As to why we can't see them, the leading explanation is that, at the beginning of the universe, all dimensions were curled up, but that at the time of the "big bang", 3 of the spacial dimensions and time unfurled, creating the universe we know to day.  The other 7 dimensions currently remain curled up in space where we cannot see them.
215076
I fear i had even thought about the ∞ dimension once. Nearly anything could be described as rotations there. It has took a long time to get a foot on earth again.\n\nTime is not the real 4th dimension. Perhaps c*t. Look at this 'Minkowski space' thingy:\n\nhttp://en.wikipedia.org/wiki/Minkowski_space\n\nIf you measure across space AND time, there are negative distances. What shoud a negative distance mean in reality?\nIf you consider time as the 4th dimension, it is just a convenient way to write down long terms shortly or to visualize complex relations concisely. It isn't more than just mathematics.\n\n\n"As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality." \n\nAlbert Einstein (personally himself)
44234
Well there are lots of things I do not completely understand about the structure of the universe. \n\nFor example, some current theories are that our 4 dimensional space-time continuum is just part of a higher dimensional entity, where some of the other dimensions are rolled up. However, the time dimension of our 4 dimensional environment is clearly much different than the spatial dimensions, since we appear to only be able to travel in one direction along the time dimension, although many of the equations capturing the physical laws of our universe are invariant when we replace time with -time.\n\nThe expansion that people refer to when they say that the universe is expanding refers to the entire 4 dimensional space-time continuum and possibly some  of the other dimensions as well. This gets very hard to visualize. What I do is think of us as ants living on the surface of a balloon that is being slowly inflated, so the dimensions of the balloon are increasing, and distant parts of the ant's space are becoming increasingly distant. However, this is probably a very limited analogy. \n\nTo get a better picture, you need to consult someone who has thought very hard and very carefully about what the universe is, or supposedly is.
12868
space as we see it has the three dimensions of space and one of it .But if u want to explain everything that is happening around us we have to assume that space is multi-dimensional.I know it is quite hard to imagine and think about a space having dimensions greater than 3 (also caled hyperspace)but there is no way out.A mathematics devised by reinmann is used to study hyperspace .It is easier to write down the equations of hyperspace than to imagine it.Gravity is also defined as the bending of this hyperspace.Many scientist's also believe that hyperspace can give us the answer for an unified field theory.
570269
at the present time we define the universe by four dimensions, length, width, height, and time.\n\nhttp://en.wikipedia.org/wiki/Spacetime
723768
according to string theory \nthere r 4 dimensions\n3-space,1-time \n[11 of course which can't be perceived normally]\nthe dimension of space - time is variable in string theory , in the sense that we have to solve the string equations to determine it\nit's too difficult because of the great complexity of the theory\nif the ans comes out to be 4 then we'd have revealed one of the most abiding and mysterious facts since the dawn of civilization
471213
It all dependend where you are filling time. In an insane intitution there are people who experience 4 ,5 of more dimentions . so far I have heard of 26 dimensions being filled including many dimentions of time.\nSpace and time have the same thing in common they can be filled both at the same instance!
747739
Theories such as string theory predict that the space we live in has in fact 10 dimensions, but that the universe measured along these additional dimensions is subatomic in size. As a result, we perceive only the three spatial dimensions that have macroscopic size.
126328
Technically, we live in a 4 dimensional world.  The forth demension is time.  There are no actual 3, 2 and 1 dimensional worlds that you can get to, but you can see a simulated 2 dimensional world.  it's the computer screen in front of you, or a tv screen, which shows only length and width, although it can show the illusion of depth.
7821
As far as you’re concerned there are three. That's what you are able to sense, measure and perceive; height, width and depth. Einstein theorized that time was a forth dimension but since you can’t change your position relative to time like you can height, width or depth, it’s doesn’t exactly work the same way. \n\nThe space you exist in has but three dimensions. Perhaps there are more dimensions but since you can’t experience them, they don’t have direct effect on you, if any effect at all, if in fact they even exist. \n\nSome Metaphysical theories postulate infinite dimensions but since no one has visited those other dimensions, they remain in realm of theory only.
355582
As a previous poster mentioned... time is the fourth dimension.  You can easily visualize this when you imagine an object moving in three dimensional space.  The movement represents the fourth dimension.\n\nI think you are asking about a fifth dimension.\n\nPeople have mathematical models for up to eleven dimensions.  I suppose that a person who knew the mathematical models for these dimensions could imagine them visually.
545067
"Time" is not a dimension in the same sense that x,y,z,a,b,c, ..etc are spatial dimensions.\n\nThough the human mind is cabable of imagining muti-dimensional space, and can create clever matematical concepts supporting the idea, there is not one whit of physical evidence to support it.  And there is ample evidence to refute it.  \n\nTake gravity, for example.  Measurments show that gravity decreases as the inverse square of the distance from the source, exactly as it should in three-dimensional space.  If there were more than three spatial dimensions, that wouldn't be the case.  So if you want to postulate there are more than three dimensions, you've got to explain why gravity ignores them!\n\nAlso, take ElectroMagnetic Radiation (EMR), which also behaves the same way - i.e. it decreases as the inverse square of the distance from the source, just as it should in three dimensional space.  So if you postulate more than three dimensions, you've got to explain why EMR doesn't know about it!\n\nAs to string theory, scientists proposing it can't agree whether it requires twenty-six dimensions in order for the math to come out right, or "just" ten!  And they all admit there's no known way to prove or disprove the theory itself. That's makes the theory pretty weak. In fact, it makes it almost science fiction! Great mind exercise, but no eidence of reality!\n\nEinstein's theories provide predictions that can be proved or disproved. That's one reason they are so powerful.\n\nSo the jury's still out on multi-dimensional space - and pobably will be for some time to come.\n\nBut it's fun to speculate!  Just don't bet your food money on it!
410204
The space-time continuum is the universe in four dimensions. And considering that I'm alive, then yes, we can survive in it.
1018923
Dimensions are not the same thing as a parellel universe.  It's one popular misconceptions carried on by mystics but created by turn-of-the-20th-century scientists when spirits were thought to exist in higher dimensions.\n\nDimensions are concepts of sides of objects and time, no more, no less.  We exist in what is visually a four dimensional universe, height, width, depth, and time.  We can't visualize objects in higher dimensional space because there is no evolutionary advantage to such a thing; tigers don't leap out at you from the fifth dimension.  String theory suggests there are 11 dimensions (or more); at the Big Bang all the dimensions existed at once then split apart.  Our 4-dimensional universe expanded in the however many other dimensions (the number depends on the theory) shrunk down to the Planck length (10^-35 meters).\n\nA parallel universe is usually what people and mystics mean when they say dimensions.  Even though a parallel universe is technically just another universe existing just out of reach of our own (possible even nanometers away).  This theory seems to be common to multiverse theory, string theory, m-theory, and a few others.\n\nOnward, if we shrink to smaller than an atom, down to the Planck length for example, we'd not lose our four-dimensionalism.  We'd just be really, really small.  We wouldn't be visible to the naked eye nor the most powerful of electron microscopes.  Nothing that exists today can probe down to that desperately small scale; there are plans to eventually do so, however.  We wouldn't slip into another world or into a 3-dimensional space (length, width, and time).\n\nThis isn't an insane question, nor is it stupid.  It's actually asking something very simple.  Remember Einstein asked himself a simple question when considering light.  "What would happen if you were to race alongside a beam of light?"  Einstein was a master of looking at things at their simplest level; from that question above came one of the most remarkable and elegant theories ever to exist: Relativity.
113366
The 4th dimension is time. It is essentially equivalent to "flat land" falling through the 3rd dimension.