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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.
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.
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.
A novel drift scan telescope, which consists of four 100 × 20 meter 5 m focal length cylinders, with an array of 256 dual-polarized radio receivers along the focus. Will map the 21 cm line of neutral hydrogen over the cosmological redshift range of 0.8 to 2.5. Collected its first light in September 2017. [49]
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James Clerk Maxwell Telescope: 1987 Mauna Kea, Hawaii, US James Gregory Telescope: 1962 St. Andrews, UK James Webb Space Telescope: 2021 Earth–Sun L 2 Lagrangian point: James Wylie Shepherd Observatory: 2009 Montevallo, Alabama, US Jakarta Observatory: 1968 Jakarta, Indonesia Jantar Mantar: 1727 Jaipur, Rajasthan, India Jena Observatory: 1962 ...
The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.
The facility's observatory dome hosts a computer-based 45 cm (1.48 ft) Cassegrain reflector telescope [1] [2] installed at the site in May 2001 and donated by the Japanese government through a cultural aid grant. [3] Before this period, the observatory used a 30 cm (0.98 ft) reflector-type telescope. [1]
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