The Webb telescope needs to be kept as cold as possible in order to detect infrared light from faint and very distant objects. A key component of this is the observatory’s tennis-court-sized sunshield, which obstructs the warmth of the Sun. In this episode of Behind the Webb, engineers add special structures to the sunshield that shape it to best reflect heat.
NASA and Mary Estacion (STScI)
Publication: October 29, 2015