Herschel's 20-foot telescope. Illustration of the 20-foot (6 metre) reflecting telescope built by astronomer William Herschel (1738-1822). Herschel bu

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Herschel's 20-foot telescope. Illustration of the 20-foot (6 metre) reflecting telescope built by astronomer William Herschel (1738-1822). Herschel built his own telescopes, laboriously grinding the lenses himself to near perfection. This was his most successful instrument; with it he discovered two new satellites of Uranus - Titania and Oberon.

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Size: 3504px × 2404px
Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 20-ft., astronomical, astronomy, equipment, herschel, herschels, historical, history, instrument, telescope, telescopes