Which specialized feature has been widely adopted in planetarium and observatory POS systems since 2019?

Modern astronomy centers, planetariums, and observatories have revolutionized their visitor experiences through specialized point of sale (POS) systems. These systems not only handle ticket sales but integrate with planetarium scheduling, telescope time allocation, and even sky conditions. How well do you know the technological innovations behind astronomy's public engagement tools?

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Dynamic pricing based on celestial events (charging premium rates during meteor showers, eclipses, etc.)
Cryptocurrency payment options with constellation-themed NFT receipts
Biometric authentication using retinal scans that map to star patterns
AI-powered holographic previews of the night's viewing conditions at checkout