Which astronomy subscription service first pioneered the 'telescope time-sharing' model that allows subscribers to remotely control professional-grade telescopes from their homes?

The astronomy industry has undergone significant changes in how consumers access telescopes, equipment, and observational data. Subscription models have transformed how amateur and professional astronomers alike engage with the cosmos. This trivia question explores a pioneering subscription service that revolutionized how people access astronomical equipment and observations without the high upfront costs of ownership.

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Slooh
Celestron All-Access
AstroVision Prime
SkyGazer Unlimited