I am Professor of Physics and Astronomy at Tel-Aviv University, and chairman of the Astrophysics Department, in the Sackler School of Physics and Astronomy.

I have recently published (Princeton University Press, 2007) an astrophysics textbook intended for undergraduate physical sciences students. It has won the 2009 Chambliss Award of the American Astronomical Society. You can browse sample chapters, or buy it, or find corrections, updates, and additional material.

My research interests include active galactic nuclei, gravitational lensing, and supernovae. You can see and read more about my research through the websites of my graduate students, some press releases with which I have been associated, my publications in the professional literature, and through some of my lectures, either at the popular or technical level, that are available online.