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Opened in 1977, the Doane Observatory is the largest aperture telescope available to the public in the Chicago area. With its 20-inch (510 mm; 51 cm) diameter mirror, the Doane can gather over 5,000 times more light than an unaided human eye, allowing guests to see celestial objects like the Moon, planets, stars, and galaxies that are trillions ...
The history of the Dearborn Observatory coincides with the founding of the Chicago Astronomical Society in 1862. [4] The society heard of the 1861 construction of a 469.9 millimetres (18.50 in) lens for a telescope, which made it, at the time, the largest refracting telescope in the world.
The company became briefly famous in 1973 when Comet Kohoutek approached Earth and the company sold out of telescopes, a fact that made national news. [2] Neil deGrasse Tyson would later comment that "The Edmund Scientific catalog was a geek's paradise. At a time when no one had access to lasers, they had them for sale." [2]
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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]
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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 ...
The Miami Dolphins could be without their starting quarterback in a second straight must-win game.. Tua Tagovailoa's status for the Dolphins' Week 18 game against the New York Jets is "firmly in ...