Which telescope design innovation, first implemented in 1948, revolutionized astronomical observation by eliminating the need for massive supporting structures?

The field of astronomy has seen remarkable innovations in telescope design over the centuries. From simple refracting telescopes to advanced space observatories, product design in astronomy has continuously evolved to meet the growing demands of scientific research. This poll tests your knowledge about a significant product design breakthrough that revolutionized astronomical observation in the 20th century.

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The Schmidt-Cassegrain compact folded light path design
The Dobsonian altazimuth mounting system
The Ritchey-Chrétien hyperbolic mirror configuration
The Rowe-Ackermann Schmidt Astrograph (RASA) optical system