Absolute simultaneity

roosh

This question arises from a separate discussion; it pertains to the relativity of simultaneity.

If the ordering of events, that leads to the relativity of simultaneity, is not physical, but there is an underlying physicality to the ordering of certain events, does that mean that there is a physically absolute simultaneity?

The answer I've encountered is that the physical ordering of events pertains to where an event is located with respect to the light-cone of another event; however, it is possible for some events to lie outside the light-cones of each other, implying that there is no physical ordering. Put another way it could be said that one event doesn't lie in the past of another unless it lies in the past light cone of that event.


Dismissing Solipsism
However, if we consider the universe starting with ourselves; if we were to take an extreme interpretation of solipsism, we might say that only ourselves exists, that the universe is, for me, constituted of me and only me, or for you, it is made up of you and only you. Unless someone cares to defend this extreme view of solipsism I think we can dismiss it. I think we can dismiss it regardless, because our physical laws could, I think, be re-interpreted in that context.

Dismissing that extreme interpretation of solipsism, we are left with the situation where the universe consists of spatially separated regions of the universe. If we consider the possibility that "we" exist, then it is, I think, reasonable to say that we exist in a moment that could be termed "now". If distant regions of the universe exist, I think it is fair to say that they also exist in this "now", such that they are simultaneous with us; that is, they exist in a shared "now".


If an event occurs in this distant region of the universe, that is, if something happens there, it necessarily occurs in the "now" it shares with us, such that the event is simultaneous with us. Given the spatial separation, however, and the finite speed of light, that event will not lie in our past light cone until a hypothetical photon from the event reaches us.

In the "past"
A contention appears to be that the event does not lie in our "past" until such time as the hypothetical photon reaches us and the event lies in our past light cone. However, if an event occurs in a distant part of the universe, in the "now" it shares with you, would it not lie in your "past" just a moment later, before a hypothetical photon has time to reach you?

im invisible

there is no past, there is no future, there is only NOW there is no now...