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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.
m Aper. in Mirror type Nationality / Sponsors Site Built Large Binocular Telescope (LBT) 11.9 m (8.4 m×2) 330" × 2: Multiple mirror, 2: USA, Italy, Germany: Mount Graham International Obs., Arizona, USA: 2004 Hobby–Eberly Telescope (HET) (11 m × 9.8 m mirror) 10 m: 394" Segmented, 91: USA, Germany: McDonald Observatory, Texas, USA: 1997 ...
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
Telescopes of comparable or larger size have subsequently employed flexible or segmented mirrors, and the BTA-6 remained the world's largest rigid-mirror telescope until the advent of spin-casting technology (which produced, for example, the single 8.4-meter primary mirror of the Large Binocular Telescope in the late 1990s).
Zooming in on a portion of the Euclid telescope's map 600 times reveals the galaxies within the cluster Abell 3381, located 470 million light-years away from Earth.