description William Herschel Telescope Overview
The William Herschel Telescope is a 4.2-meter optical and near-infrared telescope at the Roque de los Muchachos Observatory on La Palma in Spain's Canary Islands. Operated by the Isaac Newton Group of Telescopes, it achieved first light in 1987 and uses an altazimuth mounting beneath a rotating dome. Its interchangeable instruments support imaging, spectroscopy, polarimetry, and integral-field observations for professional studies ranging from Solar System bodies to distant galaxies.
help William Herschel Telescope FAQ
Where is the William Herschel Telescope located?
The William Herschel Telescope is located at the Roque de los Muchachos Observatory on the island of La Palma in Spain's Canary Islands. La Palma is one of the world's premier astronomical sites due to its stable atmosphere and low light pollution, protected by law.
How big is the William Herschel Telescope's mirror?
The William Herschel Telescope has a primary mirror with a diameter of 4.2 meters, making it one of the larger optical telescopes in Europe. It was the largest single-mirror telescope in Europe at the time of its first light in 1987.
Who operates the William Herschel Telescope?
The William Herschel Telescope is operated by the Isaac Newton Group of Telescopes, which also manages the Isaac Newton Telescope on La Palma. The ING is funded by research councils from the United Kingdom, the Netherlands, and Spain.
What kind of research is the William Herschel Telescope used for?
Since its first light in 1987, the William Herschel Telescope has contributed to research across astronomy, from studies of stellar evolution and galaxy formation to the tracking of transient phenomena such as gamma-ray bursts. Its instrumentation has been regularly upgraded, keeping it scientifically productive decades after its inauguration.
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