Tylny panel (wymiary 4' x 8') wymiennika ciepła został rozłożony. Jutro i pojutrze rozłożenie głównego zwierciadła.
At about 8:48 a.m. EST, a specialized radiator assembly necessary for Webb’s science instruments to reach their required low and stable operating temperatures deployed successfully. The Aft Deployable Instrument Radiator, or ADIR, is a large, rectangular, 4 by 8-foot panel, consisting of high-purity aluminum subpanels covered in painted honeycomb cells to create an ultra-black surface. The ADIR, which swings away from the backside of the telescope like a trap door on hinges, is connected to the instruments via flexible straps made of high-purity aluminum foil. The radiator draws heat out of the instruments and dumps it overboard to the extreme cold background of deep space.
The deployment of the ADIR – a process that released a lock to allow the panel to spring into position – took about 15 minutes.