Re: Dark Matter

[jmclean@chem.ucsd.edu (James Mclean)]

Paul Camp says:
> > Doesn't "dark" just mean that (whatever it is) it does not radiate in the
> > visible?
>
> It means that it is either (a) very cold ordinary matter so it 
> doesn't emit much in any part of the spectrum or (b) exotic stuff 
> that behaves who knows how? There was recently a rather strict limit 
> placed on at least one form of ordinary matter, brown dwarfs, which 
> means that they are probably not a significant component of the dark 
> matter. The next most serious candidate is massive neutrinos. Who 
> knows?
>
> > Jim.Green@Snow.edu                                      
> Paul J. Camp                   "The Beauty of the Universe

Would stuff that radiates light but is blocked from us by dust, etc.
qualify as 'Dark Matter'?  Or can we see pretty much everything that
radiates once you consider the whole EM spectrum?

-- 
--James McLean
jmclean@chem.ucsd.edu
post doc
UCSD