Which astronomy product category saw the largest percentage sales increase during the 2017 'Great American Eclipse' according to major astronomy retailers?

The astronomy retail sector has undergone significant transformations in recent decades, with technological advancements driving consumer interest and changing buying patterns. From traditional telescope stores to modern digital marketplaces, astronomy retailers have adapted their strategies to meet the demands of both casual stargazers and serious astronomers. This trivia question explores an interesting trend in astronomy product sales that reveals changing consumer behaviors in this specialized market.

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High-end computerized telescopes ($2,000+)
Solar viewing glasses and eclipse viewers
Astrophotography equipment and cameras
Astronomy apps and digital star charts