1. Instituto de Astrofísica de Canarias, and Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain; worked at Manchester and ESO before La Palma
2. Instituto de Astrofísica de Canarias, and Departamento de Astrofísica, Universidad de La Laguna; followed a PhD at La Laguna with a postdoc at UNAM, Mexico
3. Institute of Theoretical Physics, Charles University, Prague, Czech Republic; has a PhD from Ohio State University and was a postdoc at Princeton University, USA
4. Dept of Physics and Astronomy, University College London, UK, where he also undertook his PhD