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Basic Telescope Optics
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Reflecting Telescope
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Optical telescope
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Refracting Telescopes
What is a Refracting Telescope? | Facts, Information, Uses, Advantages
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Amazon.com : Telescope 80mm Aperture 600mm - for Beginners & Adults Astronomical Refracting Telescopes AZ Mount Tripod Fully Multi-Coated Optics 24X-180X High Magnification, with Wireless Control, Carrying Bag : Electronics
How They Work - How Telescopes Work | HowStuffWorks
Refracting telescope - Wikipedia
Refracting Telescope Facts For Kids | DK Find Out
