John Frederick William Herschel
Building a reflecting telescope with a mirror 18 inches (460 mm) in diameter, and with a 20-foot (6
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John Frederick William Herschel
Building a reflecting telescope with a mirror 18 inches (460 mm) in diameter, and with a 20-foot (6
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.