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Ever since Galileo Galilei adapted a Dutch invention for astronomical use, astronomical telescope making has been an evolving discipline. Many astronomers after the time of Galileo built their own telescopes out of necessity, but the advent of amateurs in the field building telescopes for their own enjoyment and education seems to have come into prominence in the 20th century.
Bridgeville, California (population 25) was the first town to be sold on eBay in 2002, and has been up for sale three times since. [1] In January 2003, Thatch Cay, the last privately held and undeveloped U.S. Virgin Island, was listed for auction by Idealight International. The minimum bid was US$3 million and the sale closed January 16, 2003. [2]
Sentinel Space Telescope: Proposed space telescope Sentry (monitoring system) Siding Spring Survey: 2004 2013 Space Situational Awareness Programme: 2009 [5] Spacewatch: 1984 [6] Ukrainian Optical Facilities for Near-Earth Space Surveillance Network: Vera C. Rubin Observatory: 2024 Ground-based survey telescope (under construction)
In his own words, he joked that he was "too retarded" to build a telescope with a more sophisticated equatorial telescope mount. [ 18 ] [ 2 ] With its simplicity of construction and use, the Dobsonian has become a very popular design today, particularly for large amateur telescopes. [ 17 ]
Overwhelmingly Large Telescope; Alternative names: OWL : Organization: European Southern Observatory Wavelength: 0.32 μm (940 THz)–12 μm (25 THz) Telescope style: Cassegrain reflecting telescope optical telescope Diameter: 60, 100 m (196 ft 10 in, 328 ft 1 in) Collecting area: 2,827, 7,854 m 2 (30,430, 84,540 sq ft) Focal length
When Edmund Scientific introduced the telescope in 1976 they called it "The Edmund Wide-Field Telescope" with a Part Number "2001" [5] Edmund had a public contest which ran until November 15, 1976, to come up with a name. [6] The winning name was "Astroscan 2001". The "2001" part of the name was dropped over time.
In 2013, the Adler Planetarium undertook the first major renovation of the Doane Observatory. Completed in 2015, renovations included the addition of an indoor classroom, a restroom, accessible entry ramps, and telescope and technology upgrades. [18] The Adler Planetarium is a member institution of the Large Synoptic Survey Telescope project. [29]
The smallest RCOS telescope, the 12.5 inch F/9 Ritchey-Chrétien had a base price of just over twenty thousand US dollars in 2009, with large and/or custom models costing considerably more. RC Optical Systems and Star Instruments won a lawsuit in 2008 against Meade Instruments over Meade's description of RCX400 and LX200R telescopes and the ...