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2. Celestron - Wikipedia

   en.wikipedia.org/wiki/Celestron

   Celestron was the first large scale commercial manufacturer of the Schmidt-Cassegrain telescope, introducing its "C8" 8" diameter 2032 mm focal length, ƒ10 telescope in 1970. [7] The primary innovation Celestron/Tom Johnson devised was a method to produce Schmidt corrector plates using a vacuum to pull the glass blanks into a pre-shaped curve ...

3. List of telescope types - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_types

   Modified Dall–Kirkham telescope; Schmidt camera. Baker–Nunn camera; Baker–Schmidt camera; Lensless Schmidt telescope; Mersenne–Schmidt camera; Schmidt–Cassegrain telescope. ACF Schmidt–Cassegrain telescope (Meade Instruments) Schmidt–Newtonian telescope; Schmidt–Väisälä camera; Telescopes classified by the task performed ...

4. List of largest optical reflecting telescopes - Wikipedia

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

   Multiple mirror telescopes that are on the same mount and can form a single combined image are ranked by their equivalent aperture. Fixed altitude telescopes (e.g. HET) are also ranked by their equivalent aperture. All telescopes with an effective aperture of at least 3.00 metres (118 in) at visible or near-infrared wavelengths are included.

5. Orion Telescopes & Binoculars - Wikipedia

   en.wikipedia.org/wiki/Orion_Telescopes_&_Binoculars

   Orion Telescopes & Binoculars was an American retail company that sold telescopes, binoculars and accessories online and in-store for astronomy and birdwatching. It was founded in 1975 and had corporate offices in Watsonville, California. [1] A large proportion of its products were manufactured by the Chinese company Synta for the Orion brand ...

6. List of the largest optical telescopes in North America

   en.wikipedia.org/wiki/List_of_the_largest...

   Hale Telescope Palomar Obs. 200 inch 508 cm 1949 USA: Hooker Telescope Mount Wilson Obs. 100 inch 254 cm 1917 USA: McDonald Obs. 82 inch i.e. Otto Struve Telescope: 82 inch 208 cm 1939 USA: David Dunlap Observatory: 74 inch 188 cm 1935 Canada: Plaskett telescope Dominion Astrophysical Obs. 72 inch 182 cm 1918 Canada: 69-inch Perkins Telescope [10]

7. Don't miss your last chance to get a good look at Comet A3 ...

   www.aol.com/see-comet-a3-could-best-101802103.html

   Here's everything you should know to be in the right place at the right time and spot the comet.. When and where to see Comet A3. The bad news: The comet is dimming.