2004 Buhl Lecture

Tuesday, April 27, 2004

4:30 pm   Public Lecture in Mellon Institute Auditorium
5:30 pm   Reception in Mellon Institute Lobby

Dr. Michael S. Turner, the 2004 Buhl Lecturer,  is the Assistant Director
for Mathematical and Physical Sciences of the National Science Foundation,
and the Rauner Distinguished Service Professor and Chair of
the Department of Astronomy and Astrophysics, University of Chicago.

THE DARK SIDE OF THE UNIVERSE:
BEYOND STARS AND THE STARSTUFF WE ARE MADE OF

The sky is filled with hundreds of billion galaxies, all lit up by their stars.  Stars account for less than one percent of the material in the Universe, and galaxies are held together by a new form of matter -- dark matter -- that accounts for one third of the stuff in the Universe.  The other two-thirds exists as in an even more mysterious form -- dark energy -- and is causing the expansion of the Universe to speed up, rather than slow down.