Re: The Age and Size of the Universe.

George Dingwall wrote:


If the origin was the bigbang when all energy and matter in the
universe occupying a volume of less than the smallest sub-atomic
particle, it either had a finite size or no size at all.

I think it's wrong to see it as "occupying a volume"
At the time, this was the whole universe. There is nothing on
the "outside", not then and not now.

So my question is this. If they now know that it has a volume which is
150+ billion light years across, then it must have occupied a smaller
volume in the past. So how did it manage to expand from virtually
nothing to 150+ billion lightyears across in only 13.7 billion years.

I also think "across" is a bad word to use for this. If you do, you will
end up like me :) and think like; I can see backwards in time by looking
out in all directions. The more powerful the telescope, the older the
universe I can observe. So it's all like a big onion with the oldest layer
being the outmost layer of the onion. And here I am in the middle, so
this is the newest part (and the point of origin...:)). And the part
biggest in volume is the oldest one. Hmmm... Clearly, this very "human"
way to view things must be the wrong approach when looking at the universe.

And no, I don't know of any right approaches, sorry. I'm only human :)

Surely anything that existed shortly after the bigbang could not now
be more than 70 billion lightyears away from its original position.

I wouldn't bet on that.

There are a lot of reading about this. Try googling for 'big
bang' 'superinflation' 'theory of relativity' etc..

Stephen Hawking's 'A Brief History of Time' is also good reading.



.

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