James Lick telescope - Wikipedia
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Reflecting telescope - Wikipedia
The 200-inch Hale Telescope
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Stellarvue 130mm Apo Triplet Refractor Telescope | SVA130T-25SV
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Making a Monolithic Telescope Part 2: Machining Glass - YouTube
Tons Of Molten Glass Go Into Making Mirror For Giant Telescope : The Two-Way : NPR
Link Observatory
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Casting a $20 Million Mirror for the World's Largest Telescope - IEEE Spectrum
The cheapest Prime Day telescope we've found — $62.88 for one day only | Space
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