40-foot telescope (Q3661135)

  • matcher place: Berkshire (relation 88070), Slough (relation 117097)
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  • English Wikipedia categories: Reflecting telescopes
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Summary from English Wikipedia (enwiki)

William Herschel's 40-foot telescope, also known as the Great Forty-Foot telescope, was a reflecting telescope constructed between 1785 and 1789 at Observatory House in Slough, England. It used a 48-inch (120 cm) diameter primary mirror with a 40-foot-long (12 m) focal length (hence its name "Forty-Foot"). It was the largest telescope in the world for 50 years. It may have been used to discover Enceladus and Mimas, the 6th and 7th moons of Saturn. It was dismantled in 1840 by Herschel's son John Herschel due to safety concerns; today the original mirror and a 10-foot (3.0 m) section of the tube remain.

Summary from Français / French Wikipedia (frwiki)

Le télescope de 40 pieds de William Herschel (40-foot telescope, Great Forty-Foot telescope) est un télescope construit entre 1785 et 1789 à l'observatoire astronomique Observatory House de Slough, en Angleterre. Comportant un miroir primaire de 1,2 mètre de diamètre avec une longueur focale de 12 mètres, soit 39,4 pieds (d'où le « 40 pieds »), il est le plus grand télescope du monde pendant 50 ans. Il est dépassé en taille en 1845 par le Léviathan de Parsonstown.

Wikidata location: 51.5082, -0.5954 view on OSM or edit on OSM

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support (Q1058733) support
furniture (Q14745) furniture
product (Q2424752) product
optical telescope (Q35273) telescope:type=optical
telescope (Q4213) man_made=telescope