Re: a king of finite space

On Sat, 6 Aug 2005 14:17:37 -0700, "Johan Larson"
<johan0larson8comcast0net> wrote:

>
>"Gene Ward Smith" <gwsmith@xxxxxxxxx> wrote in message
>news:1123176682.737778.299020@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>>
>> Johan Larson wrote:
>>
>>> At some level, numbers are an abstraction rather than real things. You
>>> cannot point to a number, or hold one in your hand. But natural numbers
>>> do
>>> have straightforward real referents; I can hold five books in my hand, or
>>> seven.
>>>
>>> The abstraction of infinity does not have any similar referent.
>>
>> Given that the universe is probably spacially infinite, countable
>> infinities probably *do* have such a referent, even if not one we can
>> put our hands on.
>
>Is that current cosmology? I thought the big bang basically created a bubble
>that is expanding at lightspeed, with the twist being that referring to
>anything outside the bubble is like talking about negative kelvins. That
>would make the universe of finite size at any particular time.

I thought that the universe was expanding *faster* than the speed of
light.

<http://curious.astro.cornell.edu/question.php?number=575>

"You might be wondering how we could possibly see a galaxy that is
moving away from us faster than the speed of light! The answer is that
the motion of the galaxy now has no effect whatsoever on the light
that it emitted billions of years ago. The light doesn't care what the
galaxy is doing; it just cares about the stretching of space between
its current location and us."


--
alistair



.

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