Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work. Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES. Nick KoukoufilippasDPhil Student Research themeParticle astrophysics & cosmology Sub departmentAstrophysics Research groupsBeecroft Institute for Particle Astrophysics and CosmologyCosmology nick.koukoufilippas@physics.ox.ac.uk Telephone: 01865 273433 GitHub About Research Teaching Outreach Publications I demonstrate in the 3rd year astro-labs.