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Yerkes Observatory in the old days in Williams Bay, Wisconsin, where the twin 12-inch refractor was moved. The 12-inch refractor is noted as being moved to the north dome of the Yerkes observatory, but was eventually replaced by a 24-inch reflector telescope. [4] The 12 inch refractor was a double telescope with one for visual observation and ...
The observatory's original 4.5-inch telescope was mounted onto the 12-inch refractor, and currently serves as the finder scope. [3] The observatory also contains several transit telescopes, zenith scopes, and other antique astronomical instruments used by Civil Engineers in the late 19th and early 20th centuries for geodesy and timekeeping ...
H. Fitz 12.6" refractor Detroit Observatory in Ann Arbor. Ann Arbor, Michigan, USA 32 cm (12.6 in) 32 cm 508 cm (200") 1857 The telescopes were restored to functionality as part of the University of Michigan's 2009 International Year of Astronomy celebration. Viewing nights and open houses [33] have been running since then.
The old Yerkes 24 inch (2 foot telescope) reflecting telescope, now in a museum Diagram of the Bruce astrograph. A 12-inch refractor was moved to Yerkes from Kenwood Observatory in the 1890s. [13] Two other telescopes planned for the observatory in the 1890s were a 12-inch aperture refractor and a 24-inch reflecting telescope. [13]
The first telescope installed at the observatory was a 12-inch (300-millimeter) refractor made by Alvan Clark. Astronomer E. E. Barnard used the telescope to make "exquisite photographs of comets and nebulae", according to D. J. Warner of Warner & Swasey Company. [2] The Great Lick 91-centimeter (36-inch) refractor, in an 1889 engraving
This is a list of large optical telescopes. For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes. This list combines large or expensive reflecting telescopes from any era, as what constitutes famous reflector has changed over time.
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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] Perkins Observatory: 69 inch 175 cm: 1931–1964 USA
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