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Posted by Jim on April 20, 2001 18:37:58 UTC

1. does anyone know how big the universe is?

The visible universe is about 15 billion light years in radius (give or take a few billion light years). The entire universe is bigger than that and may in fact be infinite.

a. If you have a good idea how old it is wouldn't it be the age times the speed of light times two?

The age is about 15 billion years (give or take a few); therefore, the diameter of the visible part is that many light years times two.

2. If the universe started off as a big bang doesn't that suggest some force stronger than a black hole?

"Stronger"? I suppose, but I don't see how a direct comparison is possible.

a. if all the matter and energy were concentrated into a tiny space isn't that the same as a black hole?

No. Matter and energy were not concentrated into a tiny space. ALL of space, time, matter, and energy were concentrated into a tiny space...there was nothing outside that we know of.

b. Are we not told that nothing can escape a black hole?

Yes. But a black hole is defined as something IN space. The Big Bang seed (whatever it was) was, by definition, not a black hole.

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