Time's arrow is an illusion. What was still is, what will be always has been.
An interesting question, always. Does tomorrow exist? Does yesterday exist? There is nothing without change: electromagnetic vibration defines everything whether energy or matter, and vibration is time-variance. But as we know, we can either measure velocity or position, not both, so is time just a byproduct of space variance?<br />
Th enext most interesting question is:<br />
What does "exists" mean?
As with space time is just relitive.<br />
The only real time is internal...not an external clock.
This is a pet concept of mine. Time is "measured' by sending signals of light - all of Relativity Theory is ba<x>sed on this and every other theory I've ever heard of PRESUMES time exists, dating back to Kant and included in M Theory [SuperStrings]. To me time is a measure of change, like temperature is a measure of motion, so if there is NO motion, how does one "measure" how much time has elapsed?<br />
In college physics my professor trotted out the old Millikan drop experiment "proving" the unit charge of an electron is fundamental. At the time i wondered [silently] whether we weren't just measuring MULTIPLES of a smaller charge over and over. Turns out my instinct was right -QUARKS have 1/3 charge and 2/3 charge!!!
Time (and the direction of time's arrow) does seem to be tied with an unavoidable increase in entropy, or the increasing disorder of everything. Entropy is how we actually measure time - not with clocks. Clocks are only a gauge for plotting the break down of an ordered system (the clock's mechanism). No one is really sure whether time IS something or if it is an emergent illusion.
Yeah it's just a man made system of measurement, it doesn't really exist the way most think it does.<br />
What is interesting, is everything that ever was, and everything that ever will be, could be right now, we only perceive ourselves as being in the current moment.
That "moment" exists in the moment it existed in, even if your perception of the moment has changed.
Time is an ocean<br />
But it ends at the shore
Our measure of time is ba<x>sed on the things you mentioned...true. Were we to step outside of this system our measure ceases to have value. how far outside the system do you mean?<br />
Our tiny little point in the galaxy, which is infinitely small in relation to the universe, measures increments for no other purpose than to give us context in our life.<br />
I had another thought...or was about to...who can tell?
So Time is Timeless?
the past doesn't exist and the future doesn't exist only now exist. the reason they don't exist is if they did exist there would be a past and future you. there can't be; just like I can't be you and you can be me. we are absolutely unique.
but you are no longer there and when were it wasn't the past it was now
You gone from time into the idea of dimensions that time splits into different paths based off the choices you made and could have made