The biggest scientific satellite ever built in Europe, the XMM-Newton observatory has been orbiting Earth for a decade - with its mirrors capturing X-ray images from across the Universe.
See what the telescope has seen in its first 10 years - with X-ray astronomer, Dr Kathy Romer - and her University of Sussex colleague, Dr Darren Baskill, who has helped to calibrate the delicate machinery.
Music courtesy KPM Music. Slideshow production by Paul Kerley. Publication date 10 December 2009.