ESA's X-ray Multi-Mirror (XMM) high-throughput X-ray spectroscopy mission will be launched by Ariane-5 in 1999. The Mirror Support Platform for XMM's Structural and Thermal Model (STM) is seen under integration at Dornier, with the three telescopes and the Service Module. [Image Date: 1997-09-00] [97.10.010-003]