Which product innovation significantly democratized astronomy by allowing smartphones to capture detailed celestial images when attached to telescope eyepieces?

The astronomy industry has experienced remarkable technological advancements in recent years. From sophisticated telescope designs to innovative mobile applications, product innovation has transformed how both professionals and amateurs explore the cosmos. This poll tests your knowledge about a significant product innovation milestone that changed astronomical observation accessibility in the modern era.

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Smartphone eyepiece adapters (first popularized around 2012-2014)
Standalone digital telescope cameras (introduced in the late 1990s)
Telescope remote control systems (developed primarily after 2018)
Automated star-tracking mounts (mainstream adoption beginning in 2005)