[Q=KrazyHorse;5653700]a) That is not an "event horizon"[/q]
It's a boundary beyond which light cannot escape. All the stuff I've been reading lately describe it as an event horizon. I realize Discovery is crap, but my understanding is that Scientific American is pretty well respected.
I understand what you are writing, but I've been led to believe that there's a limit to how far we can see and that there are parts of the universe that have always been cats outside that locked door. But, I'm not a theoretical physicist.
It's a boundary beyond which light cannot escape. All the stuff I've been reading lately describe it as an event horizon. I realize Discovery is crap, but my understanding is that Scientific American is pretty well respected.
b) There are points in the universe which we were previously in causal contact with which we will never be in contact with again, due to inflation. I don't understand what you're saying here. If I'm locked in a room with a cat, then the cat is pulled out of the room and the door is locked again, then the cat (over the period of time it was in the room) continues to be part of my universe. The current cat is not part of my universe, but this terminology is itself flawed due to relativity.
I understand what you are writing, but I've been led to believe that there's a limit to how far we can see and that there are parts of the universe that have always been cats outside that locked door. But, I'm not a theoretical physicist.
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