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reflector telescope 
Portrait of amateur astronomers & their telescopes
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6.5m. Optical Telescope on Mt. Hopkins,
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William Herschel 40 Foot Telescope, 1880s
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Hobby-Eberly Telescope, McDonald Observatory
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Hooker Telescope, Mount Wilson Observatory, California
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Herschel 7' Reflector Telescope Replica
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Domestic astronomical observatory, 19th century
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Herschel's 40-foot telescope, 1789
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Palomar Observatory
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Isaac Newton's Telescope
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William Herschel 40 Foot Telescope, 1880s
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William Herschel 40 Foot Telescope, 1880s
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Palomar Observatory
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Calar Alto Observatory, Spain
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Crossley reflector telescope
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Reflecting Telescope, 1789
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Reflecting Telescope, 1789
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Reflecting Telescope, 1789
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Herschel's 40 Foot Telescope, 1789
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Messier Marathon
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Stargazing
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Palomar Observatory
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Hale Telescope, Palomar Observatory
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Palomar Observatory
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Hale Telescope, Palomar Observatory
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