You can see these boxes which are covered with metal foils for thermal reasons, and they are also, most of the time, thermally controlled inside to keep reasonable temperature inside each of these containers.

Claude Nicollier (born 2 September 1944 in Vevey Switzerland) is the first astronaut from Switzerland and has flown on four Space Shuttle missions. He took part in two servicing missions to the Hubble Space Telescope (called STS-61 and STS-103). Nicollier retired from ESA in April 2007.