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Original mirror for William Herschel�s forty-foot telescope, 1785. — Weasyl
The Forty-Foot Telescope at Slough. Photographed by Sir John F.W. Herschel photographed 9 September 1839; this print made in August 1890 | Sir John Frederick William HERSCHEL
The Forty-Foot Telescope at Slough. Photographed by Sir John F.W. Herschel photographed 9 September 1839; this print made in August 1890 | Sir John Frederick William HERSCHEL
Engraving depicting William Herschel's giant telescope which had a focal length of 40-feet. William Herschel (1738-1822) a German-born British astronomer and composer. Dated 19th century - SuperStock
William Herschels Telescope Stock Illustration - Download Image Now - Swamp, 18th Century Style, 19th Century - iStock
40-foot telescope - Wikiwand
Great Forty-Foot Telescope | Multiwavelength Astronomy
Photograph | William Herschel 40 Foot Telescope, 18 | Science Source Images
Sir William Herschel's forty-foot telescope at slough. - NYPL Digital Collections