Which e-commerce innovation did NASA first introduce in 2018 that revolutionized how astronomical equipment is purchased online?

The astronomy retail landscape has transformed dramatically with digital technology. Major observatories and space agencies have developed sophisticated online platforms to share discoveries, sell merchandise, and engage enthusiasts. This poll tests your knowledge about the evolution of e-commerce platforms specifically in the astronomy sector, where specialized equipment, software, and educational materials are marketed to both professionals and amateur stargazers.

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AR Telescope Preview - allowing customers to visualize telescope views from their location before purchase
Constellation Subscription Box - monthly deliveries of astronomy gear matched to seasonal celestial events
Astronomer's Marketplace - peer-to-peer platform for trading used observatory equipment
Space-Time Shopping - scheduling purchases to arrive precisely during astronomical events