What is the PGI? The initiative is a collaborative effort between Princeton’s Astrophysics, Mathematics, and Physics departments to explore the fundamental nature of gravity. Learn More Events Mar 20 PGI Seminar Series Spring 2023|Dejan Gajic|University of Leipzig|"Azimuthal Instabilities on Extremal Black Holes" Mar 20, 2023, 12:30 pm Mar 27 PGI Seminar Series Spring 2023|Lam Hui|Columbia University|"TBA" Mar 27, 2023, 12:30 pm Apr 6 PGI Seminar Series Spring 2023|Josu Aurrekoetxea|Oxford|"Fundamental Physics from the Strong-Field Regime of Gravity" Apr 6, 2023, 12:30 pm View All Research Areas Astrophysics Mathematics Physics Interface with Experiment and Observation News Rita Teixeira da Costa Awarded the 2022 AWM Dissertation Prize Professor Frans Pretorius receives the 2021 ICTP Dirac Medal and Prize Yakov Shlapentokh-Rothman named 2021 Sloan Research Fellow View All Join our initiative Sign up for our mailing list stay informed of our latest events and announcements.