Our knowledge from direct observations about far away regions of the universe is limited due to the observation horizon. If the Universe expands and the acceleration gets faster and faster, isn't it a inevitably consequence that everywhere and in every direction subuniverses are arising from the view of hypothetical observers in any space-time-region (so that every subsystem is not causally connected to another subsystem for an observer, because he just cannot gain information about the other system)?
I tried to imagine it with the analogy of black holes: If i could sit in one of them, and you in another, our observations would again be limited by the event horizon of our black hole - we couldn't know anything about each other or even about the existence of the other just from observations. Isn't this a proper definition of a disconnected system from the view of an observer? And in the case of expansion and the observation horizon: a disconnected universe?
Lastly, another question: What is the connection between the nature of time and our observation horizon? If we look deep in space our look in the past is limited. But if space expands in all directions with time shouldn't the same be true for the future? Is our look into the future limited, because the acceleration of speed expansion is already greater than the speed of light? Or is this thought a logical fault?
Thanks
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