Re: Where are they?

Michael Lorrey (retroman@together.net)
Thu, 27 Nov 1997 06:00:07 -0500

Robin Hanson wrote:
>
> carl feynman <carlf@atg.com> wrote:
> >>I've wondered about the intergalatic bubbles: if you had a soup of
> >>galaxies, and randomly seeded it with rare expanding intelligence, would
> >>you get the bubbles we observe, with visible galaxies in the areas between
> >...
> >if civilizations for some reason like to leave 'neutral zones' between ...
> >If the civilizations that built the bubbles wanted to conserve energy for
> >the longest possible time,
> >... requires that all expansion was complete a long time ago.
>
> If we look far enough out, we should see when the voids formed, and this
> theory would seem to predict that each void would expand rapidly from a
> central point. We aren't too far from testing this prediction I think.
>
> Radical energy conservation seems a bizzare tendency to observe in *all* voids
> across the universe. They obviously aren't hiding from each other, after
> all. It would seem to imply they can't create new universes to explore, and
> so realize that their local energy is all they'll ever have.
>
> Having neutral zones full of visibly noisy galaxies also seems odd.
> In neutral zones on earth, one tries to minimize activity so that it is easist
> to tell if someone is trying to cross.
>

The idea that those empty bubbles are huge spheres of dysoned galaxies
is a fanciful one, but not supported by observed evidence. That most
observable matter coalesced into the interbubble regions is an observed
confirmation of big bang theory predictions, that its the small
percentage of fluff normal matter that was in excess of the ~50%
matter/antimatter ratio.

Additionally, if there were just dysoned stars in those bubbles, then
there would still be ample interstellar gasses for new star formation,
as well as a measurable amount of nova and supernovae detritus.

One area where missing mass may be found is in megagalaxies. Astronomers
have recently found a galaxy that is ten times the mass of our own
galaxy, but is so large in size(100x the milky ways diameter) that its
mass is spread out to the point of undetectability unless you are
specifically looking for it, and can expose long enough to gather enough
light to visualize.

Has anyone found a current guesstimate of the matter "equivalence" of
all of the energy in the universe at that 3 deg K cosmic background
level? has this been accounted for in the missing mass calcs???

-- 
TANSTAAFL!!!
			Michael Lorrey
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mailto:retroman@together.net	Inventor of the Lorrey Drive
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