The William Herschel Telescope (WHT) is the second largest telescope of Roque de Los Muchachos in La Palma. With a primary mirror of 4.2 m in diameter it is also the second largest telescope in Europe only after the Gran Telescopio de Canarias (primary mirror 10.4 m). At present this telescope is of modest size, nevertheless remains one of the most productive in scientific publications of the world. It has a f2.8 focal ratio and is Cassegrain-Nasmyth type. The William Herschel telescope can be visited at concerted visits. To book a visit to the Observatory: Visits. History The UK's Science and Engineering Research Council (SERC) began planning the telescope in 1974 with a final budget of 10 million pounds. In 1981, 20% of the SERC negotiated a 20% stake with Holland, so the telescope belongs to the United Kingdom and the rest to the Netherlands. The first light of the telescope was on June 1, 1981 using the instrument TAURUS-2. Results The most outstanding results extracted with data obtained in this telescope are: * The discovery of the first evidence of a supermassive black hole (Sgr A*) in the center of the Milky Way. * The first optical observation of a gamma ray burst Curiosities * The telescope takes the name of the astronomer William Herschel (Germany 1738 - England 1822), a musician without scientific formation who began his interest in the astronomy to the 35 years of age. This astronomer discovered the planet Uranus with a 1.2m reflecting telescope that built the same along with his sister since he could not afford to buy a refractor telescope of similar size to the use at the time. Herschel was also a pioneer in the design of the azimuth
The William Herschel Telescope (WHT) is the second largest telescope of Roque de Los Muchachos in La Palma. With a primary mirror of 4.2 m in diameter it is also the second largest telescope in
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