I am fascinated by the "inner space/outer space" connections that link the science at the smallest and largest scales.  My research focusses on the highest-energy sites in nature--the big bang, exploding stars (supernovae), and high-energy particles in space (cosmic rays)--where nuclear physics and elementary particle physics play a central role.  Understanding these processes and their interplay allows us to trace the history of matter over cosmic time. Turning the problem around, I use these high-energy phenomena as particle accelerators to probe fundamental physics in ways inaccessible to terrestrial experiment.

PhD in Physics. U. of Chicago 1994.
AB in Physics and English. Williams College 1989.

Multiple appearances on the Excellent Teachers List
University Scholar 2014-2017

ASTR 210: Introduction to Astrophysics (Spring 2018)
ASTR 401 Scientific Writing for ASTR 406 (Fall 2013)
ASTR 406 - Galaxies and the Universe ( Fall 2013)
ASTR 350: Introduction to Cosmology (Fall 2011)
ASTR 596/496:The Art and Practice of Astronomy (FA14, FA15)
ASTR 596/496 PC: Physical Cosmology (Spring 2010)
ASTR 596/496 NPA: Nuclear and Particle Astrophysics (Fall 2009)

216 Astronomy Building, MC-221
1002 W. Green St.
Urbana, IL 61801

(217) 333-5529