Which innovative marketing technique did NASA primarily use to build anticipation for the James Webb Space Telescope prior to its December 2021 launch?

NASA's James Webb Space Telescope represented one of the most significant advancements in astronomy in decades. Behind this scientific marvel was also a sophisticated product launch and marketing campaign to generate public interest and support. This poll tests your knowledge of how space agencies market major astronomical instruments and missions to both scientific communities and the general public.

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Interactive 'First Light' countdown website allowing users to simulate the telescope's capabilities on their own astronomical targets
Tiered reveal strategy showcasing engineering milestones over years with behind-the-scenes content and expert interviews
Virtual reality experience distributed to science museums that let visitors 'operate' the telescope
Celebrity endorsement campaign featuring prominent astronomers and science communicators as 'Webb Ambassadors'