From: Mike Lorrey (firstname.lastname@example.org)
Date: Sun Jan 13 2002 - 09:47:04 MST
"Robert J. Bradbury" wrote:
> The only thing I've seen is the recent paper (perhaps from Amara)
> discussing how Axions could explain the apparent acceleration of
> the expansion of the Universe by precisely such a "dimming" effect
> (as photons oscillate into Axions).
> We may also want to be wary of over simplification. There may
> be two different explanations for dark matter. Galactic halos
> may be ATC while dark matter effects in galactic clusters may
> be intergalactic hydrogen. Think about how long it has taken
> to resolve the GRB observations into sub-classes such as colliding
> neutron stars and hypernovae. But everyone started out looking
> for a one-size fits all explanation.
Well, if a large percentage of all the stars that ever existed ejected
the majority of their planetesimals during system formation due to
orbital resonances, and the population of brown dwarfs is much higher
than observations have yet determined, this could only account for a
small percentage of the 'dark' matter that models require.
The difficulty today, of course, is that our models and theories now
outstrip our ability to observe, despite instruments like Hubble and
Keck, etc. At best they can give us vague, fuzzy, and barely inferential
evidence, which is easily disputed and debated by opponents.
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