Which retail innovation has most significantly transformed visitor experiences at major astronomical observatories in the past decade?

The astronomy industry has been transformed by technological innovations that enhance both research capabilities and public engagement. Modern observatories are not just scientific facilities but also visitor destinations with sophisticated retail operations. This trivia question focuses on how cutting-edge retail innovation has been implemented in major astronomical facilities worldwide, changing how astronomy enthusiasts interact with and purchase astronomy-related products and experiences.

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AR-powered star navigation apps that allow visitors to purchase and name visible celestial bodies through observatory gift shops
Interactive digital kiosks that create personalized night sky maps and custom telescope configurations based on visitor preferences and location
Subscription-based observatory access passes that use blockchain technology to verify viewing time ownership
AI-powered observatory retail systems that predict cosmic events and automatically price merchandise based on celestial rarity