The Webb telescope is comprised of some very large structures, and those have to fit together before, during, and after launch. Extreme care has to be taken when moving equipment that weighs thousands of pounds. This episode of Behind the Webb gives us a glimpse into what it takes to test the compatibility between the backplane that will hold the primary mirror segments, the sunshield, and the spacecraft bus. We also see how the sunshield will be pulled into position, giving us a sense of how large the observatory will be when it's in orbit.
NASA and Mary Estacion (STScI)
Publication: March 31, 2015