Explore a comprehensive lecture on astrophysical phenomena and particle physics presented by Ben Safdi at the Galileo Galilei Institute. Delve into the intricacies of neutron star cooling processes, examine the polarization of magnetic white dwarfs, and investigate the fascinating concept of axion/photon conversion within neutron stars. Gain valuable insights into these cutting-edge topics in astrophysics and particle physics over the course of 1 hour and 13 minutes, expanding your understanding of some of the most enigmatic objects in the universe and their potential connections to fundamental particle interactions.