# Heading towards what ? and when will reach the destination ?

1. Jun 11, 2012

### Zubeen

Heading towards what ??? and when will reach the destination ?

We say that time doesn't moves because it's a coordinate but we move and it seems that time moves . OK granted , but where are we heading towards ??? and even if we are heading toward something........ what will happen if we'll reach the destination ??

2. Jun 11, 2012

### ghwellsjr

Re: Heading towards what ??? and when will reach the destination ?

Motion is a change in distance during a change in time. We can say that other things "move" in the sense that they change by some amount during a duration of time, like the temperature is rising by 10 degrees per hour or it's raining at 1 inch per hour. But what would it mean to talk about the motion of time? The change in time during some period of time???

3. Jun 12, 2012

### Zubeen

Re: Heading towards what ??? and when will reach the destination ?

I am saying, that since time is a coordinate, just like the x,y and z axis and remains constant at a position in the space time (if we are perfectly still ) but to explain the fact that time appears to be moving, we say that we are actually moving with respect to stationary coordinate and hence time appears to be moving.
So my question is, where are we heading towards through our motion and what will happen if we reach that point ???

4. Jun 12, 2012

### Ger

Re: Heading towards what ??? and when will reach the destination ?

time t=0 is at the start of an event. Time t=t1 is the time of another event in same frame. The time difference between both events depends on your frame of reference and the frame speed difference between the rest frame of the events.

Time,x,y,z are all depending on your frame of reference and not pinpointed to some fixed frame.

5. Jun 12, 2012

### harrylin

Re: Heading towards what ??? and when will reach the destination ?

You seem to adhere to the philosophical concept of "the flow of time". I would say that time is a measure of progress of physical processes and thus of change; we tend to measure "time" with things that move or at least, with things that change. Thus there is a conceptual link between motion and time. A "time coordinate" is simply a geometrical representation of that progress or change. We can interpret the time axis as representing a virtual constant speed particle trajectory along an axis, and which thus serves as a measure of "time". There is no destination, just continuation.

Last edited: Jun 12, 2012
6. Jun 12, 2012

### Staff: Mentor

Re: Heading towards what ??? and when will reach the destination ?

If there is some death of the universe (big crunch, big rip, whatever), we are "heading towards this".
If not, we are just constantly "going towards the future", without a single final destination.

7. Jun 14, 2012

### Zubeen

Re: Heading towards what ??? and when will reach the destination ?