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2. Reflecting telescope - Wikipedia

   en.wikipedia.org/wiki/Reflecting_telescope

   Stratospheric Observatory for Infrared Astronomy 24-inch convertible Newtonian/Cassegrain reflecting telescope on display at the Franklin Institute. A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.

3. File:Comparison optical telescope primary mirrors.svg

   en.wikipedia.org/wiki/File:Comparison_optical...

   2) Great Paris Exhibition Telescope, 49 inches (1.24 m), 1900 (largest refractor ever built; had practically no scientific usage) Ground-based reflectors: 3) Hooker Telescope, 100 inches (2.54 m), 1917; world's largest telescope from 1917 to 1949 4) Multiple Mirror Telescope, 186 inches (4.72 m) effective, 1979–1998; 6.5 m, from 1998

4. List of largest optical telescopes in the British Isles

   en.wikipedia.org/wiki/List_of_largest_optical...

   Discovered as Georgium Sidus, later known as Uranus was one of the famous discoveries made from the British Isles The mirror from the 40-foot telescope, on display at the Science Museum, London. Former Royal Greenwich Observatory, Herstmonceux , East Sussex; this was an important site for telescopes in the latter 20th century in England.

5. Primary mirror - Wikipedia

   en.wikipedia.org/wiki/Primary_mirror

   The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m (27 ft) Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997; [3] [better source needed] however, this is not the largest diameter single mirror in a telescope, the U.S./German/Italian Large Binocular ...

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Dobsonian telescope - Wikipedia

   en.wikipedia.org/wiki/Dobsonian_telescope

   Truss Dobsonians of 12 to 18 inches (305 to 457 mm) are the most popular sizes, as they offer substantial aperture yet can still be easily set up by one person. Several manufacturers offer models of 24 inch (610 mm) aperture and greater. Truss Dobsonians are the largest telescopes commercially available today.