Can we separate Between Time and space? I think yes...but my teacher is not agree with me.?
957577
probably your teacher drives to school in a car that can reach relativistic speed ( a good fraction of c)\n\nnow seriously :  in our every day life time and space can very well be considered independent, you can separate them with a high level *very very high) of accuracy. These effects of Special and General Relativity are negligible in the world around us.\n\nThat's why all students of Physics still begin their study with Newtonian mechanics and all engineers here on earth do not apply relativity formulas where space and time are interdependent
585685
Time is a dimension we dont understand because is different from our 3 spacial dimensions.. \n\ntime is really the difference of states from one point of the universe to the next, since the universe is expanding time goes on that direction.. the only way to go back would be a way to figure out how to stop the expansion of teh universe.. good luck!\n\nIm hoping for telletransportation, but it's just as hard
239506
Mr. Question's answer is baloney - a tell-tale sign is the complete lack of sources "a scientist in a northwest university"... give us names and places, please! \n\nAnyway, if you're interested in a "real-life" time machine, you need to look at General Relativity, in which time (being a dimension in space-time) can be warped in the presence of gravitational fields. However, you'd need a gigantic, massively heavy, incredibly quickly rotating object in order to warp spacetime enough to make any kind of dent in the passage of time.
1033398
1. Time is a variable and not a constant. It ran backward only in Harry Potter's Vol 3 using Time Machine\n2.The perpendicular distance is the shortest distance\n3.Why not\n4.The variable nature of time can be felf only with objects moving with a velocity that approaches that of light. The theory of Relativity cannot be proved wrong because no one has understood it completely
200856
The author Kurt Vonnegut once wrote that (I'm paraphrasing) units of time (moments, seconds, etc.) should be thought of not as connected points along a line, but rather like grains of soil in a mountain.  It's an interesting concept if you think about it.  One could move through time from one unit to another adjacent one without the ability to skip over one. Since each of us only exists in only one of them "at a time", so to speak, collectively we would be occupying all of them simultaneously.  It could explain where we "go to" when we are lost in thought, or how time seems to slow during some activities and speed up during others.  It might also help to understand the concept of multiple simultaneous dimensions. The notion of moving "ahead" through time is relative to your local frame of reference, just as "up" is relative to your local field of gravity and ceases to exist without a center of gravity.
432971
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).
513714
time is not linear and people can shape shift, remote veiw, and time travel. For the answer to your question, simply sit and meditate upon it, it will become clear....you already know.
679344
Speaking from the vantage point of one with some training in physics...  You are entirely correct.  Astronomers even take advantage of this effect by looking at extremely distant objects to see what the very early universe was like.\nVery intelligent question!  Good observation.\n\nAdditional: Some of the other answers are raising a valid point.  (Good job, Silverskorpious and Johhny!)  Space and time are not rigid and flat, but curved and pliable.  However, the phonomenon still works since any amount of time passing bewteen the emission and perception of light still places the event firmly in the past by the time it's observed.
951543
It is not mass that curves space time. Remember that mass is transformed between frames under relativity. Instead it is stress energy. This means that frame invariant combination of mass and energy, including the effect of the movement of the mass.\n\nAnd there is no prospect that these are mutual.
257950
There is nothing called 'spacetime'\nIt is scientifically named space-time.\nIt means ***central concept in the theory of relativity that replaces the earlier concepts of space and time as separate absolute entities. In relativity one cannot uniquely distinguish space and time as elements in descriptions of events. Space and time are joined together in an intimate combination in which time becomes the "fourth dimension."***
965397
Travelling back in time is not allowed by einstein's theory of relativity...however if you can instantly teleport youself to some faraway star,say a 101 light years away, you might be able to catch einstein receiving his nobel prize!! as stated earlier, there is no master grandfather clock that is regularly ticking away the seconds..rather that rate is adjustable...but one may zip into the future..consider an example where you are on a space-ship at a speed of 0.99990 c that is going away from the earth and coming back..in your time frame say,it takes about twenty years..using lorentz transformations, the time for your to and fro motion is close to 450 years!!
31234
Einstein said we are living in the past time, that means we have not "now time"!\nSo, nobody can not answer, what time is it! maybe we can ask, what time was it!!
820808
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 :-)
943807
The product of space and time is not so much an abstraction as much as an aberrated perception. ( Why, In GR theory, is everyone always going deductively DOWNWARDS into the collapse rather than inductively tracking the event back to original precipitating events?  The answers are THERE.)
1026311
Time?  No.  Space?  Hell no.\n\nUnfortunately, we will never be able to do either of the two.  The energy levels in our solar system are what hold our molecules and atoms together.  Stray too far and you will find yourself entering a part of the Universe that has a different charge balance, the electrons will begin flying off, and you will start falling to pieces.\n\nTime travel is a concept that everyone can understand so it persists.  Any changes that have happened to the matter have already taken place, there's no going back.  Just like you can't unburn a match, you can't turn back time.
1153545
There are a lot of theories about space and time, but I like what a Tom Stoppard character said in the play "Arcadia".  He said one can quickly stir marmalade into porridge, but can NOT stir it back out . \n\nThis is a parable or metaphor for pointing out that time is a framework of process, and most processes-- such as entropy, for example-- move in only one direction.  Although one can run a video backwards, no one in reality can unbake a cake separating it into flour, chocolate, baking powder and other ingredients, nor send the merest slice of chocolate cake "back in time" to co-exist with the flour, chocolate and baking powder of its former existence. \n\n Sending YOU back to live with your ancestors-- you, who, no doubt, have a few atoms and molecules in you from nearly every human being who ever lived-- would be like trying to get a speck of jelly stirred out of the porridge, unbaking a cake:  reversing a process that is complete already!  In time, of course, the process of baking the cake will reverse itself in a way, for the cake, one way or another, will vanish, in the entropy of cakes represented by chewing, digestion, spoiling in the refrigerator, getting stale and being thrown in the garbage for flies and maggots.  But in no sense can a time machine be built to send the least crumb of cake, the least excuse for a man, back in time.\n\n And this is because time is a correlative function of whatever processes occur within a given time frame. Time, whether it speeds up or slows down under certain conditions as claimed in the theory of relativity-- is a process that could not work in reverse! (I don't "know" this, but am convinced-- which, to an old man, is the same thing!) \n\nThink:  If we went back to the time of Alexander, and our 21st century body had one of the atoms in it that formerly had belonged to Alexander, who would get the atom?  If you had "inherited" a patch of skin or a nose from a Native American contemporary of Alexander, who'd get the nose?  Would it, out of courtesy, fly off of his face and snap onto your face, just because you had managed to travel back in time?  There is a rule that is unarguable:  only one person can use a particular atom or a particular molecule of water at a time.  \n\n The other kind of "time travel"--  freezing people and animals into "corpsicles" to be thawed out in ten thousand years-- might seem like time travel to the person surviving the "thaw cycle", but in reality it would not be,  for inducing suspended animation through freezing would not affect "time", it would merely arrest or slow the universal entropy of living things-- aging-- and delay the universal "extreme entropy" experienced ultimately by all who live:  death! \n\n I have been fascinated by suspended animation since, as a child,  I once practiced it: freezing in a block of ice a small fish I caught in a pond, leaving it in the freezer, putting the block of ice back in the pond, and watching the fish swim away.  The fish was swimming at the same rate as he was before I caught him, and, also,  the fish through the entire process "traveled in time" at the same rate as the rest of us, and didn't need a machine-- a Montgomery Ward refrigerator or an Alley Oop time machine-- to do it.  If the freezing didn't hurt its health, the freezing merely delayed its death by the couple of weeks it lay frozen in our freezing compartment.\n\nFish and men, civilizations and stars,  are born, go through certain changes and processes, then they die and can never more be revisited. Elvis sings and leaves the stage, and, no matter how many times  you back to Vegas, you won't find him.
1117205
Time rejects the idea of multiple possibilities, and possibilities reject the idea of time. Is this disjunct resolved by a homogenous continuum, or a curved one? Same question, maybe providing of insight?