I am a professor at the Department of Physics & Astronomy, UCLA in the Division of Astronomy and Astrophysics . I am also Howard and Astrid Preston Chair in Astrophysics.

I am a member of the Bhaumik Institute for Theoretical Physics and serve on the executive committee.

I am interested in a broad range of theoretical astrophysics topics, emphasizing dynamical research problems from cosmology to black holes, Gravitational wave sources, stars, and extrasolar planets. My main research subject during my Ph.D. was the first generation of galaxies and 21cm fluctuations. I am also very interested in the theoretical challenges and problems in the dynamics of our solar and extrasolar planetary systems. Most notably, I have found a new mechanism that not only produces Jupiter-like planets in a very close proximity to their host star but can also explain the eccentric and even retrograde observed systems. This mechanism, which is based on triple-body interactions, appears to be dynamically rich and merits further investigation. In recent years, I have studied the underlying physics of triple-body systems and shown that these systems are far more exciting and richer than initially thought of in the past. These new developments are now being applied by the community to a diverse range of astrophysical systems at different scales.

Before joining UCLA I was an Einstein Fellow at the ITC - Harvard-Smithsonian CfA. Prior to that I was an IAU Gruber postdoctoral fellow at the Northwestern University, CIERA. I did my PhD studies in the Department of Astronomy and Astrophysics, at the Tel Aviv University. My PhD advisor was Rennan Barkana. I graduated from the Racah institute at The Hebrew University. My Master advisor was Nir Shaviv.