In a press release by NASA today, it is reported that the James Webb
Telescope has been assembled for the first time.
Story, photos :-
https://www.nasa.gov/feature/goddard...the-first-time
Note the gold coated primary segments for reflection in the near infrared.
Video on the gold coating here :-
https://www.youtube.com/watch?v=t2OuCPUxxAA