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The Hobby–Eberly Telescope (HET) is a 10-meter (30-foot) aperture telescope located at the McDonald Observatory in Davis Mountains, Texas. The Hobby–Eberly Telescope is one of the largest optical telescopes in the world. It combines a number of features that differentiate it from most telescope designs, resulting in lowered construction ...
Largest does not always equate to being the best telescopes, and overall light gathering power of the optical system can be a poor measure of a telescope's performance. Space-based telescopes, such as the Hubble Space Telescope, take advantage of being above the Earth's atmosphere to reach higher resolution and greater light gathering through ...
Location Lens diameter Focal length Built Comments Image Yerkes Observatory [6] Williams Bay, Wisconsin, USA: 102 cm (40") 19.4 m (62′) 1897: Largest in operation [7] James Lick telescope Lick Observatory: Mount Hamilton, California, USA: 91 cm (36") 17.6 m: 1888 William Thaw Telescope Allegheny Observatory: Pittsburgh, Pennsylvania, USA: 76 ...
The then-unnamed Otto Struve Telescope was dedicated on May 5, 1939, [2] and at that time was the second largest telescope in the world. McDonald Observatory was operated under contract by The University of Chicago until the 1960s, when control was transferred to The University of Texas at Austin under the direction of Harlan J. Smith. [3]
Astronomical observatories are mainly divided into four categories: space-based, airborne, ground-based, and underground-based. Many modern telescopes and observatories are located in space to observe astronomical objects in wavelengths of the electromagnetic spectrum that cannot penetrate the Earth's atmosphere (such as ultraviolet radiation ...
At the dawn of the 17th Century, Galileo Galilei began the first major search of the night sky (as well as the Sun!) using a new Dutch invention — the telescope. In the era when William ...
The Giant Magellan Telescope (GMT) is a ground-based, extremely large telescope currently under construction at Las Campanas Observatory in Chile's Atacama Desert.With a primary mirror diameter of 25.4 meters, it is expected to be the largest Gregorian telescope ever built, observing in optical and mid-infrared wavelengths (320–25,000 nm). [1]
The Harlan J. Smith Telescope is a 107-inch (2.7 m) telescope located at the McDonald Observatory, in Texas, in the United States. This telescope is one of several research telescopes that are part of the University of Texas at Austin observatory perched on Mount Locke in the Davis Mountains of west Texas.