The XMM mirrors during integration

The XMM mirror modules on the backside of the XMM service module. One spider carrying a full set of 58 flight mirror shells is visible on the left side, while the two other modules are covered. At the bottom left the baffle of the Optical Monitor (OM) telescope is clearly visible. One also has a good view of the tanks on the corners of the service module and the pairs of little thrusters to which they belong.

Photo courtesy of Dornier Satellitensysteme GmbH.