isnt there a permeability of space time?
126550
The permeability of space is given the symbol of the greek letter mu.\nThe permeability of free space (vaccuum) has a value of \n4 * pi * 10 ^(-7)     H*m^(-1)\n\nThe permeability of free space is, AND I EMPHASISE THAT THIS IS ONLY A CONCEPTUAL DESCRIPTION, how hard it is to set up a magnetic field in whatever medium we are considering.\n\nAll of magnetics depend on the permeability of free space - it is used in almost every calculation of magnetic field strength.\n\nTry searching wikipedia for "Ampere's Law"\nOr Maxwell's Correction to Ampere's Law (Displacement current)\nThe latter is the most fundamental equation for how currents and varying E fields set up magnetic fields, and, as you will see, the equation has mu in it!!\n\n:)
72770
There actually are theorists who say that it is possible to move faster than the speed of light through the distortion of space time. \nThe flaw is that it takes as much energy as about a million suns in order to be able to distort space that much. However, the big bang would have had the energy to do so. With that much outward force, and that much energy being released (remember it is all known matter being created in one instant) it probably was enough.
655904
Well this one is interesting.  Mathematics tell us that to move in time, one must move faster than the speed of light.  There are particles that do move that fast so it is theoretically possible.\n\nWith that having been said, I'll go back to the particles that move faster than light.  These particles cannot be seen or measured in any way that we can figure out but we know that they exist because of the reaction of other things.  ( its like the wind blowing,  you dont see it but trees and stuff react to it )\n\nOne theory suggests that if we do manage to travel back in time,  we wont be able to interact with it at all. ( I dont understand all the mechanics on this one)  But it would be like being an invisible ghost.  You could observe things and events but couldnt make actual physical contact with anything thus you couldnt change events.
415817
You can't move through something that doesn't exist! Time is not a NATURAL feature of the universe but simply a concept invented by our species to separate events into past, present and future. There is no Cosmic Master Clock that keeps track of absolute, universal time. There is no physical "past" trailing along behind the "present," nor any physical "future" waiting up ahead for us to get there.
27639
No.  You'd need to have a wormhole.  Current theory predicts that transversable wormholes exist but would not allow time travel.  See reference for details.
609331
Watch NOVA on public television or science channel. There was an episode about string theory.\n\nIt's scientifically possible to explain other dimentions. Therefore, perhaps, we leave this world and go to another when we die! perhaps ghosts are just people trapped between dimensions.
109024
It has width, depth and length. However it does not have time. because it has no mass. Empty space is certainly something but it has and probably will be a paradox for a long long time. At one time the "fabric" of space was reffered to as the "ether" as in ethereal, but even this ascribes to much "material" to empty space.
191674
spacetime is finite yet has no boundary. it may be something like the two dimensional surface of sphere. the surface of a sphere has a finite amount of space but has no edge so some immortal, two dimensional being living on the two dimensional universe could travel forever in one direction, never turning left or right, and repeatedly pass the same place. remember, tho, the sphere is three dimensional, and anything inside or outside the sphere does not exist for this immortal, two dimensional being. nothing exists outside the universe in this model. not even space and time exist outside the universe.
311781
'Outside the universe' seem to me to belong to the universe!\nYou think the universe is that small???\nI do not know the answer on your question.\nLet me ask you: can the space time be curved without mass or only thanks to mass?
193728
The idea that time is another dimension is not currently in favor, so if you were to take a contemporary view, time isnt a dimension at all.  Thus, a 2 dimensional object moving through time would be just that- a changable 2D object.  Time is a degree of freedom for motion, physical and chemical reactions, etc, but not (again, currently thought) to be a dimension equivalent to the three we exist in (or the 13 or so that are sub-microscopic).
204421
It is an incorrect concept that space is full of nothing.  There are dust particles and gas molecules in space.  The solar wind from our sun is always blowing particles into space.  There is also a galactic wind that is blowing particles out into space as well.\n\nSpace is as close as we can get to natural vacuum, or nothingness but it still has a density of one atom per cubic meter.
431970
The concept of "beyond space" is flawed; space-time has no beyond for there to be anything in at all. Our limited perception of the stuff around us in three dimensions leads us to imagine the universe or even all of space as some giant sphere or disc of matter floating in space, but really, space and time being the same thing mean that our universe and all within it is everything we can perceive, full stop. Ergo, there is no inside to be outside of. \n\neither that or its turtles all the way down :-)
327338
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.
571055
It is really impossible to know for sure, but there are several theories in physics about this.  It could be possible for multiple universes.  It put a link to Wikipedia that is very interesting reading if you are interested in learning more.
227419
with the same length of time??? possible but not probable....\n\n\nyou see according to einstein theory of relativity, the speed of light is the speed of near perfection....and it is not that easily attainable unless you have a force of a large magnitude...\n\n\n\nonce you travel that speed you can travel into the future for about a split second..\n\n\n\na more probable situation would be try getting sucked into a blackhole, and you'll speed up to the speed of light...\n\n\n\ncompare a blackhole to a sinkhole, a typical hole in your kitchen sink...fill it up with water but cover the hole...\n\nthen release the cover..the water will get sucked down into the hole...obviously the water will end up somewhere, right??? just like anything sucked up by a blackhole, it would eventually end up somewhere in the time-space dimension... and they call it the whiteholes.... and quantum physicists say that when you let your right hand get sucked into the black hole and ends up on the other end(white hole)..you'll notice that your right hand exist a micro second earlier than your left hand...(assuming your whole body doesn't get sucked up into the black hole)..\n\n\nback to your question...hehehe... getting sucked up in a blackhole will give you a speed equal or nearly equal to the speed of light...
54700
Yes. Wormholes subconciously send a ray of time 100 Million years  later into our universe. Witch means we wouldn't notice that it use to be the dinosaurs time and a quasar or worhole zapped us here now! You can never enter a wormhole once you enter it its portal to time closes and anybody who goes in it is trapped in eternal nothingness.
213619
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!