What is time? If it doesn't exist ( no start or end ) then how can we travel through it? Answer in form #1-2

Question

Time Travel

Answer 1

it exists simply because we perceive it to exists

Answer 2

Time is the result of our transition outward from the Big Bang. All things in the universe are moving outward from the initial Big Bang in the fourth dimension (the time dimension). The rate of the transition outward from the Big Bang is at a rate equal to the speed of light. This relationship can easily be seen when measuring velocity. All measurements of velocity in any direction is always in reference to time. If you plot this relationship you will see that time is always plotted perpendicular to any movement in any spatial direction. Any plot of any variables that are perpendicular to each other are recognized as each being a dimension. Time and our transition outward from the Big Bang is therefore a different dimension then any spatial dimension. This is why time is recognized as a fourth dimension.

Answer 3

1) Time is very difficult to define, because nearly any attempt at defining it involves concepts of "now", "later", or "sequentially", all of which are themselves dependant on time. The best answer I can give is that time is a mental construct that allows us to analyze and understand certain phenomena and thier relation to one another. We descrive events as happening concurrently, or sequentially, and say that certain events will cause others to happen in the future.

2) Scientifically, there really ins't any convincing evidence that we travel through time. If you picture in your mind a freeze-frame of all the things that are happening NOW on earth and in the entire universe, and further imagine collecting these images every split-second and lining them up one after another, you would eventually have a coherent picture of everything in the universe happeing -in time-.

Here's the problem, though. How do you know which one is "now"? Is there some special way that your mind is able to "light up" one frame and choose it to be "now"? How do you do that for the entire universe? Furthermore, relativistic physics tell us that observers who are very distant from one another and who are moving relative to one another will observe different events to be happening at the same time; they have different "nows". How can we account for this? Do both of thier minds light up different frames at the same time when the lit up frame itself is supposed to represent "now"?!

Rather than suggesting some illusory process for defining a moment to be "now" at every moment in time for every possible observer, scientists sometimes think of every moment beign perpetually "frozen". Whatever exists in that moment does exist, has existed, and will continue to exist forever. We are simply experiencing them one at a time, one after another.

Time travel itself is another, much trikier issue. It may or may not be even theoretically possible, and any physically feasable method is currently far, far beyond our understanding. Even if it were possible, we wouldn't really be "travelling" in time. If you took a time machine back to watch Caesar being killed on the Senate floor in Rome, you were there, are there, and will always be there.

Answer 4

The only reason we use to time is to well, time things. Like, 'I'll meet you at three." It just like why we name streets.

<3