Which innovative marketing approach by Celestron in the 1970s revolutionized the amateur astronomy market and made Schmidt-Cassegrain telescopes widely accessible?

In the competitive world of astronomy products, certain innovations and marketing strategies have transformed how we explore the night sky. This poll tests your knowledge of a pivotal moment in astronomy retail history that democratized stargazing for the masses and forever changed the telescope industry. Do you know which product marketing breakthrough revolutionized amateur astronomy in the 1970s?

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The 'Celestron 8' campaign that introduced mass-produced Schmidt-Cassegrain telescopes at one-third the previous market price
The 'Stars in Your Hands' program that allowed customers to rent telescopes before purchasing
The 'Astronomy for All' initiative that bundled free university-level astronomy courses with telescope purchases
The 'Celestial Partnership' collaboration with NASA that included moon landing imagery with each telescope