One of the first cosmologists to suggest that galaxies are immersed in large halos of dark matter, Jeremiah Ostriker has been an influential researcher in the most exciting areas of modern astrophysics and cosmology. His areas of study include the structure and oscillations of rotating stars, dark matter and dark energy, pulsars, x-ray binary stars, the Warm-Hot Intergalactic Medium, gravitational lensing, astrophysical blast waves, active galactic nuclei, the cosmic web, galaxy formation, and black hole growth. Ostriker’s many awards for a lifetime of scientific contributions include the Bruce Medal and the National Medal of Science. He serves as Treasurer of the National Academy of Sciences and is the author of more than 500 scientific publications. Coauthored with Simon Mitton, Heart of Darkness tells how scientists across history have worked to piece together the cosmic structure of the universe.

In conversation with Gino Segre, Professor of Physics Emeritus, University of Pennsylvania