• Thumbnail for Great refractor
    Great refractor refers to a large telescope with a lens, usually the largest refractor at an observatory with an equatorial mount. The preeminence and...
    37 KB (3,266 words) - 20:18, 26 May 2025
  • Thumbnail for Meudon Great Refractor
    include the James Lick telescope (91.4), Potsdam Great Refractor (80+50 cm), and the Greenwich 28 inch refractor (71.1 cm). Institutionally it was part of the...
    17 KB (1,874 words) - 23:48, 27 May 2025
  • Thumbnail for Refracting telescope
    A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a...
    35 KB (3,712 words) - 05:47, 21 May 2025
  • Thumbnail for Paris Observatory
    Observatory in 1926. The Meudon Great refractor is the third largest astronomical refractor of its type in the world. The Meudon refractor is located in the Grande...
    29 KB (3,072 words) - 23:14, 15 March 2025
  • Thumbnail for List of largest optical refracting telescopes
    "Harvard College Observatory: Great Refractor". www.cfa.harvard.edu. 4 October 2023. "Telescope: Harvard 15-inch Refractor". amazing-space.stsci.edu. "Perth...
    39 KB (1,053 words) - 09:23, 14 May 2025
  • Thumbnail for Potsdam Great Refractor
    Potsdam Great Refractor (Große Refraktor) is an historic astronomical telescope in an observatory in Potsdam, Brandenburg, Germany. Completed in 1899...
    20 KB (1,895 words) - 15:20, 28 April 2025
  • Thumbnail for Yerkes Observatory
    main dome houses a 40-in aperture (102 cm) doublet lens refracting telescope, the largest refractor ever successfully used for astronomical observation....
    62 KB (5,556 words) - 19:02, 27 May 2025
  • Thumbnail for List of the largest optical telescopes in North America
    "Harvard College Observatory: Great Refractor". www.cfa.harvard.edu. Retrieved September 8, 2019. "Fitz/Clark 12-in Refractor". The General History of Astronomy...
    17 KB (357 words) - 05:20, 18 February 2025
  • Thumbnail for Jean Focas
    surfaces from the National Observatory of Athens, Pic du Midi, and Meudon Great Refractor. Jean is responsible for creating the most highly visual map of Mars...
    15 KB (1,489 words) - 12:47, 6 April 2025
  • Thumbnail for Archenhold Observatory
    Archenhold Observatory (category Great refractors)
    an observatory in Berlin-Treptow. It houses the Großer Refraktor (Great Refractor), which is the longest pointable telescope in the world. It is also...
    21 KB (2,497 words) - 12:49, 23 May 2025
  • Thumbnail for Hamburg Observatory
    fourth largest in the World. The Observatory also has an old style Great Refractor (a Großen Refraktor), a long telescope with a lens (60 cm/~23.6 in...
    24 KB (2,215 words) - 19:29, 23 October 2024
  • Thumbnail for James Lick telescope
    a limited basis. Also called the "Great Lick Refractor" or simply "Lick Refractor", it was the largest refracting telescope in the world until 1897,...
    7 KB (714 words) - 20:13, 22 October 2024
  • Thumbnail for Harvard College Observatory
    the Harvard College Observatory. HCO's first telescope, the 15-inch Great Refractor, was installed in 1847. That telescope was the largest in the United...
    7 KB (668 words) - 05:05, 14 May 2025
  • Thumbnail for Robert-Aglaé Cauchoix
    and instrument maker, whose lenses played a part in the race of the great refractor telescopes in the first half of the 19th century. At first Cauchoix...
    5 KB (455 words) - 22:22, 20 July 2024
  • Thumbnail for Greenwich 28-inch refractor
    12.8 inch aperture refractor at the same location. The 12.8 inch was moved to be a guide telescope for the Thompson 26-inch refractor. The mounting dates...
    17 KB (1,955 words) - 23:45, 27 May 2025
  • Refracting telescopes, with lenses, especially achromatic doublets, rather than mirrors were popular in the 19th century (see also great refractor)....
    24 KB (1,049 words) - 20:50, 11 April 2025
  • Thumbnail for Albert Einstein Science Park
    perform checks of Einstein's theory of General Relativity; and the Great Refractor of Potsdam, which today belong to the Astrophysical Institute Potsdam...
    3 KB (255 words) - 12:50, 27 September 2023
  • Thumbnail for Diaphragm (optics)
    cm (~23.6 inch) aperture Great Refractor by Reposold and Steinheil (Lenses). One unique feature of the Hamburg Great Refractor is an iris diaphragm that...
    11 KB (1,383 words) - 00:09, 14 June 2025
  • Thumbnail for Leibniz Institute for Astrophysics Potsdam
    west of Berlin, though the Einstein Tower solar observatory and the great refractor telescope on Telegrafenberg in Potsdam belong to the AIP. The key topics...
    30 KB (3,549 words) - 21:45, 15 August 2024
  • Thumbnail for Paris inch
    Paris inch is the lens measurement of the first great refractor telescope, the Dorpat Great Refractor, also known as the Fraunhofer 9-inch. The 9-Paris...
    3 KB (342 words) - 10:36, 23 February 2024
  • Thumbnail for Harvard–Smithsonian Center for Astrophysics
    Adams Whipple used the Great Refractor to produce the first clear Daguerrotypes of the Moon (winning them an award at the 1851 Great Exhibition in London)...
    27 KB (2,936 words) - 19:45, 31 May 2025
  • Thumbnail for Astrophotography
    on July 16 and 17, 1850 with Harvard College Observatory's 15 inch Great refractor. In 1863 the English chemist William Allen Miller and English amateur...
    44 KB (5,270 words) - 19:04, 9 June 2025
  • Lens sag (category Refracting telescopes)
    the Yerkes refractor (1897) with an aperture of 40 in (100 cm). Hence the 1890s marked the high point of the great refractors era. "Refracting Telescopes"...
    2 KB (205 words) - 10:36, 2 June 2025
  • Thumbnail for World's fair
    fair was followed by other national exhibitions in Europe. In 1851, the "Great Exhibition of the Works of Industry of All Nations" was held in the Crystal...
    65 KB (4,874 words) - 18:45, 25 May 2025
  • Thumbnail for Nice Observatory
    Nice Observatory (category Great refractors)
    1880s). In the records for the largest refracting telescopes, all three were outperformed by the 91 cm (36 in) refractor installed at the Lick Observatory...
    10 KB (976 words) - 14:14, 11 December 2024
  • Thumbnail for Heliosphere
    capitalize on Voyager's observations. 1904: Astronomers using the Potsdam Great Refractor with a spectrograph find evidence of the interstellar medium while...
    63 KB (6,577 words) - 11:03, 14 June 2025
  • Thumbnail for E. M. Antoniadi
    Observeratory, provided him with access to the Grande Lunette (83-cm Great Refractor) He became a highly reputed observer of Mars, and at first supported...
    11 KB (1,053 words) - 18:54, 10 December 2024
  • releases have confirmation of a Refractor on the back of the card in the form of either an R or the word 'Refractor' printed, usually, beside or beneath...
    5 KB (651 words) - 14:44, 9 February 2025
  • Thumbnail for Royal Observatory, Greenwich
    a new larger refractor, the 28-inch Grubb in the Great Equatorial Dome. Because the new telescope was longer than the old Great refractor, the new dome...
    55 KB (5,985 words) - 06:00, 2 June 2025
  • Thumbnail for Aerial telescope
    the original on 2012-04-26. Retrieved 2012-03-05. Huygens and His Great Refractor Institute and Museum of the History of Science - Galileo's telescope...
    13 KB (1,473 words) - 18:15, 7 May 2025