Re: If gravity gravitates?

From: Larry Shultis (goldbach_at_charter.net)
Date: 08/10/04 

Date: Mon, 09 Aug 2004 23:55:11 -0500

Tom Roberts wrote:
> Larry Shultis wrote:
>
>> Suppose that the universe has a radius R to which
>> all matter and EM radiation extends at present.
>
>
> Current cosmological models which have such an R have compact spatial
> 3-surfaces that are closed, and have the same R.
>
>
>> Since gravitons, if they exist, do not seem to
>> be affected by R, there should be a gravitating
>> graviton field, outside the radius R, [...]
>
>
> In the cosmological models I referred to above, there "is" nothing
> outside radius R. That is, one cannot even speak of what "is outside R".

What, then keeps gravity (gravitons) from leaking to radii greater
than R? Mass-energy of the universe would have to gravitate
omni-directionally, would it not, and not just within the radius R?
Does the recently calculated diameter of the universe, about 156x10^9
light years include the limit of gravity's influence? If so, what
influence does the gravitation of the gravitational field
beyond the radius, which matter and radiation other than gravity have
reached, have on that matter and radiation? Would it just act as a
spherical shell producing a net zero gravitational field everywhere
in the universe such as a spherical shell of matter would do?
Larry

>
> This is quite similar to asking what is further than 40,000 kilometers
> away on the surface of the earth -- something that is 10 kilometers away
> is (in some sense) also 40,010 kilometers away (idealizing the earth as
> a spheroid 40,000 km in circumference)....
>
>
> Tom Roberts tjroberts@lucent.com

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