I am the George S. Wise Professor at Tel-Aviv University, in the School of Physics and Astronomy, the Director of the Wise Observatory, and a member of the Astrophysics Department.

I have published (Princeton University Press, 2007, 2016) an astrophysics textbook intended for undergraduate physical sciences students. It has won the 2009 Chambliss Award of the American Astronomical Society. An expanded and updated 2nd edition came out 2016. You can browse sample chapters, or buy it, or find corrections, updates, and additional material.

My research interests include active galactic nuclei, gravitational lensing, supernovae and other transients, extrasolar planets, binary stellar systems, compact stellar remnants (white dwarfs, neutron stars, black holes), and more... 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.