Which revolutionary product development strategy by Celestron in the 1970s dramatically reduced telescope prices and helped popularize amateur astronomy?

In the competitive world of astronomy products, some innovations and marketing strategies have defined entire eras of stargazing. Celestron, founded in 1960, transformed from a small electronics company into an astronomy powerhouse through groundbreaking product development and marketing. Test your knowledge of how this iconic brand changed the amateur astronomy landscape forever!

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Introduction of the Schmidt-Cassegrain design with computer-controlled manufacturing
Partnership with NASA to repurpose space telescope technology for consumer use
Development of the first smartphone-compatible telescope control system
Creation of subscription-based 'Telescope-as-a-Service' business model