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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.
The primary mirror is constructed from 91 hexagonal segments, which is less expensive than manufacturing a single large primary. The telescope is named for former Texas Lieutenant-Governor Bill Hobby and for Robert E. Eberly, a Penn State benefactor. Three instruments are available to analyze the light from the targets.
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
The Large Binocular Telescope (LBT) is an optical telescope for astronomy located on 10,700-foot (3,300 m) Mount Graham, in the Pinaleno Mountains of southeastern Arizona, United States. It is a part of the Mount Graham International Observatory .
The Large Millimeter Telescope (LMT) (Spanish: Gran Telescopio Milimétrico, or GTM), officially the Large Millimeter Telescope Alfonso Serrano (Spanish: Gran Telescopio Milimétrico Alfonso Serrano), is the world's largest single-aperture telescope in its frequency range, built for observing radio waves in the wave lengths from approximately 0.85 to 4 mm.
Water vapour in the Earth's atmosphere blocks much of the infrared band, although some limited observations are possible and there is a number of infrared observatories. Sometimes other optical telescopes can make infrared observations if they are equipped with the right detectors, even if they are not dedicated infrared observatories.
Kitt Peak is the National Observatory of the United States, in contrast to the various benefactor and privately funded telescopes. The largest optical telescope at Kitt Peak is the 4 meter aperture Mayall reflector, and the bureaucracy also supports a variety of other instruments throughout the United States and internationally, but not telescopes such as Hubble, supported by NASA (which is a ...
The Hale Telescope represented the technological limit in building large optical telescopes for over 30 years. It was the largest telescope in the world from its construction in 1949 until the Soviet BTA-6 was built in 1976, and the second largest until the construction of the Keck Observatory Keck 1 in Hawaii in 1993.