Yes, the reuniting is an event, an event like every event that occurs in 
the present moment.

Think about it this way. Assume every observer in the entire universe 
travels relativistically to meet up at a common location. There will be 
billions of different clock time readings on their clocks but they will all 
be together in a single common present moment.

Therefore it is clear and inescapable that the present moment is universal 
and common to every observer in the universe.

All the effects of SR and GR affect clock times, but every one of them 
occurs in a single common present moment they all share.

In fact this is completely clear because otherwise they could not even 
compare clock time results to know they were different. 


On Tuesday, December 24, 2013 8:26:00 PM UTC-5, Edgar L. Owen wrote:
> Liz states that "Special relativity shows that there is no such thing as 
> a "common present moment". but this is incorrect.
> Actually special relativity shows exactly the opposite. In my book I 
> explain how this works. It is well known, though little understood, that 
> everything without exception continually travels through spacetime at the 
> speed of light according to its own comoving clock. I call this the STc 
> Principle. This is a well known consequence of special relativity but 
> actually as I point out in my book this is an even more fundamental 
> Principle than Special Relativity and Special Relativity is properly a 
> consequence of it and can be derived from it.
> What the STc Principle says is that the total velocity through both space 
> and through time of everything without exception is = to the speed of 
> light. This is the reason that time slows on a clock moving with some 
> relative spatial velocity, as Special Relativity tells us.
> It also demonstrates that the speed of light is properly understood as the 
> speed of TIME. That's what c really is. Light just happens to move entirely 
> in space according to its own comoving clock, therefore its entire 
> spacetime velocity is in space only.
> Anyway it is precisely this STc Principle that puts both the arrow of time 
> and a privileged present moment on a firm physical basis. Why? Because it 
> requires that everything must be in one particular place in spacetime (the 
> present moment) and moving at the speed of light (the arrow of time).
> So exactly contrary to your statement, it is precisely special relativity, 
> properly understood, that puts both the arrow of time and a common present 
> moment on a firm physical basis.
> This insight simultaneously solves two of the big problems of the 
> philosophy of science, the source of the arrow of time, and the reason for 
> a common present moment, though no one seems to have recognized this prior 
> to my exposition in 1997 in my paper 'Spacetime and Consciousness'.
> Edgar

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