Paul Murdin in his own words : The crucial and overriding incident that defined my life irrevocably was catching polio at the age of 7 years. That made it difficult to walk. It made me sedentary and an avid reader – a swot. I studied because I liked to, and that made it possible for me to go to university via a scholarship to Oxford. I was able to develop this into a job as an astronomer at the Royal Greenwich Observatory (RGO). In the late 1960s I became interested in identifying the stars newly discovered as responsible for emitting X-rays. The X-rays are a flag that a star is waving at us saying 'Look at me! I’m interesting! Working with Louise Webster, I found in 1971 that one such star, Cygnus X-1, was a black hole. I think that qualifies as interesting! I went on to work at the Anglo-Australian Observatory but soon returned to the RGO to work setting up the UK telescopes on La Palma. In the later part of my life, I became a scientific administr...