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Telescopes can be classified by optical design or mechanical design/construction. Telescopes can also be classified by where they are placed, such as space telescopes . One major determining factor is type of light, or particle being observed including devices referred to as "telescopes" that do not form an image or use optics.
Telescopes and other facilities on the summit of Cerro Tololo. The 4.0 m (158 in) Víctor M. Blanco Telescope (Blanco 4m) was completed in 1974 and is very similar to the Nicholas U. Mayall Telescope that was completed at KPNO in 1973. [12] Testing of the telescope and instruments lasted until the beginning of 1976 when science operations began ...
The ads focused on the telescope's mechanical and optical design, educational value for children, ease of use, and adaptations as a spotting scope and telephoto lens. The Questar of the 1950s and early 1960s had a proprietary screw in eyepiece design and offered little capacity to employ third-party accessories.
The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light. An optical telescope gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.
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.
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 ...