30.0 MB (2.5 MB compressed)
3359 x 3122 pixels
28.4 x 26.4 cm ⏐ 11.2 x 10.4 in (300dpi)
COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY COLLECTION ABECASIS / SCIENCE PHOTO LIBRARY
Herschel's 40 foot telescope. 1891 illustration of a telescope, the largest of its time, designed by the German-British astronomer Sir Frederick William Herschel (1738-1822). The telescope, with a tube 40 foot (12 metres) long, was located at Observatory House in Slough, England, UK. Observations began on 28 August 1789, and two new moons of Saturn (Enceladus and Mimas) were discovered. The telescope was moved by an assistant in the hut (lower left). Herschel would make his observations from the platform (right) at the front of the telescope, looking down the tube at the mirror, which was made of polished metal, not glass. The telescope cost 4000 pounds to build, and was dismantled in 1839.
Model release not required. Property release not required.