![William Herschel's reflecting telescope of 40 ft (12 m) focal length, 1789 (1807). Built by the German-born English astronomer, William Herschel (1738-1822), in the ground - Album alb4003310 William Herschel's reflecting telescope of 40 ft (12 m) focal length, 1789 (1807). Built by the German-born English astronomer, William Herschel (1738-1822), in the ground - Album alb4003310](https://www.album-online.com/photos/prev/NmM0Y2NkMA/album_alb4003310.jpg)
William Herschel's reflecting telescope of 40 ft (12 m) focal length, 1789 (1807). Built by the German-born English astronomer, William Herschel (1738-1822), in the ground - Album alb4003310
![William Herschel 40 Foot Telescope, 1880s Poster Print by Science Source (24 x 36) : Amazon.co.uk: Home & Kitchen William Herschel 40 Foot Telescope, 1880s Poster Print by Science Source (24 x 36) : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/81hJCngx2DL._AC_UF894,1000_QL80_.jpg)
William Herschel 40 Foot Telescope, 1880s Poster Print by Science Source (24 x 36) : Amazon.co.uk: Home & Kitchen
![Dome Of William Herschel Telescope Photograph by Royal Greenwich Observatory/science Photo Library - Fine Art America Dome Of William Herschel Telescope Photograph by Royal Greenwich Observatory/science Photo Library - Fine Art America](https://images.fineartamerica.com/images/artworkimages/mediumlarge/2/dome-of-william-herschel-telescope-royal-greenwich-observatoryscience-photo-library.jpg)
Dome Of William Herschel Telescope Photograph by Royal Greenwich Observatory/science Photo Library - Fine Art America
![WILLIAM HERSCHEL (1738-1822) Anglo-German astronomer. His 40ft (12 m) telescope at his Observatory House near Slough, England, built 1785-1789 Stock Photo - Alamy WILLIAM HERSCHEL (1738-1822) Anglo-German astronomer. His 40ft (12 m) telescope at his Observatory House near Slough, England, built 1785-1789 Stock Photo - Alamy](https://c8.alamy.com/comp/H6ECA2/william-herschel-1738-1822-anglo-german-astronomer-his-40ft-12-m-telescope-H6ECA2.jpg)
WILLIAM HERSCHEL (1738-1822) Anglo-German astronomer. His 40ft (12 m) telescope at his Observatory House near Slough, England, built 1785-1789 Stock Photo - Alamy
![The William Herschel Telescope Enhanced Area Velocity Explorer (WEAVE) is now being installed at the WHT in La Palma | ICCUB The William Herschel Telescope Enhanced Area Velocity Explorer (WEAVE) is now being installed at the WHT in La Palma | ICCUB](https://icc.ub.edu/sites/icc/files/styles/card_600x400/public/media/imatge/2021-10/WEAVE_FIBRE_POSITIONER.png?h=532f109e&itok=_9q6fdaY)