- Key Takeaways - How the History of Telescopes Began With a Spyglass - Why Mirrors Replaced the Long Refractor - How Mountain Observatories Made Telescopes Into Scientific Infrastructure - How Radio Telescopes Opened a Sky No Eye Could See - How Space Telescopes Escaped the Atmosphere - How Digital Detectors and Surveys Changed Observation - How July 2026 Telescopes Define the Current Era - How T...