Which astronomical event triggered the largest single-day sales of consumer telescopes in retail history, leading to a revolutionary shift in astronomy product advertising?

The astronomy industry relies heavily on sophisticated marketing and retail strategies to sell telescopes and other stargazing equipment. Major astronomy retailers often time their biggest sales around specific celestial events that capture public imagination. This poll tests your knowledge about one of the most successful retail promotions in astronomy product history, which dramatically changed how astronomical equipment is marketed to the public.

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

The 2017 Total Solar Eclipse across the United States
The 2012 Venus Transit across the Sun
The 2018 Mars Opposition (closest approach to Earth)
The 2020 Great Conjunction of Jupiter and Saturn