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. Kearn GrisdalePostdoctoral Research Assistant Sub departmentAstrophysics Research groupsExtremely Large Telescope kearn.grisdale@physics.ox.ac.uk Telephone: 73309 Denys Wilkinson Building, room 361B About Publications