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Posted by Michael on October 15, 2001 07:42:14 UTC

What was the super-expansion and what it means that some regions of the universe became disjoint ?? I guess the key is the sentence: "It is only now that these areas of the universe are coming within our 15 billion light year horizon." ... but what exactly does it mean ??? They were disjoint and now they become joint, in what sense, how it is possible ? Also I must say I become lost when the talk is about "our" Universe versus the "overall" Universe. Maybe I need some introduction to these concepts. I am physicist but with little knowledge of this cosmology topic.

Bruce, your particular assertion "had time to reach us since t = 0" makes me wonder since in the case of "my" galaxy the light not only had time to reach us but even run away from us. What I mean that, unless someone convinces me otherwise, I don't see how it is possible there are parts of universe from which light still has not reached us. Again, my argument is purely geometrical based on relatively small size of universe comparing to speed of light. But again, if this particular galaxy was not in "our" Universe but in this other "overall" universe then maybe I get my explanation provided I get to understand what these concepts really mean.

I feel I ma learning something important here.

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