Which astronomy subscription service pioneered the 'pay-per-view' model for remote telescope access, revolutionizing how amateurs could observe deep space objects?

In the competitive world of astronomy, subscription-based services have transformed how professionals and amateurs access the cosmos. From telescope time to image databases, subscription models have democratized space science while creating sustainable business models. Test your knowledge about one of the most innovative subscription services in modern astronomy!

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• Slooh Space Camera
• NASA's Astronomy Picture of the Day Premium
• SkyWatch Observatory Network
• Celestron CloudView

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