Title:

          Lighthouses in the Sea of Dark Matter



Brent Tully
Institute for Astronomy
University of Hawaii




Abstract:


The structure of the universe is a consequence of the distribution
of dark matter.  Baryonic matter, the stuff we see, constitutes only
a small fraction of the density of the universe.  How well does light
trace the dark matter?  We will first take a qualitative look at the
distribution of light.  Then attention will be given to evidence that
there are important variations in the relationship between light and
dark matter that depend on environment.