Which subscription-based astronomy service pioneered the 'Citizen Science' business model that allows subscribers to participate in actual astronomical research?

The astronomy industry has developed innovative subscription models for both professional and amateur stargazers. From telescope rental services to space observation data access, astronomy retail has evolved dramatically in the digital age. Test your knowledge about how the business of astronomy connects consumers with the cosmos through modern subscription services.

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Slooh, which lets subscribers remotely control telescopes and participate in discovery projects
Celestron NexStar+, which offers premium star charts and observation guides based on user location
NASA's Planetary Defenders Club, which provides early access to space mission data
SkyWatch Premium, which delivers monthly astronomy equipment to subscribers' homes