Which innovative astronomical product design revolutionized amateur astronomy in the 1970s by eliminating the need for large, expensive telescope tubes while maintaining high-quality viewing capabilities?

The astronomy industry has seen remarkable product innovations over the decades, transforming how we observe and understand the cosmos. From ancient astrolabes to modern space telescopes, these tools have dramatically enhanced our ability to explore the universe. This poll tests your knowledge about a significant product innovation breakthrough that changed astronomical observation capabilities for both professionals and amateur stargazers alike.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Dobsonian Telescope - An alt-azimuth mounted Newtonian reflector design that used low-cost materials and simplified construction
Schmidt-Cassegrain Telescope - A compact catadioptric design that used corrector plates to eliminate optical aberrations
Maksutov-Cassegrain Telescope - A catadioptric system with a deeply curved meniscus corrector lens for improved image quality
Radio Interferometer Array - A system of connected radio telescopes that created virtual apertures for enhanced resolution