My approach here is essentially to provide a chronological catalogue of cosmic X-ray satellite missions - especially if the evolution of our understanding of the X-ray sky is summarised alongside - narrating how an initial 'fuzzy' glimpse through a new window into the universe has become ever sharper and more complete.
I also thought it would be important to explain how the satellite instruments would not have been possible withouth the technical and observational outputs of the UK/US/other ...