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  2. Yerkes Observatory - Wikipedia

    en.wikipedia.org/wiki/Yerkes_Observatory

    Yerkes Observatory (/ ˈ j ɜːr k iː z / ⓘ YUR-keez) is an astronomical observatory located in Williams Bay, Wisconsin, United States. The observatory was operated by the University of Chicago Department of Astronomy and Astrophysics [ 2 ] [ 3 ] from its founding in 1897 until 2018.

  3. Here's how an artist builds the world's largest glass tree in ...

    www.aol.com/heres-artist-builds-worlds-largest...

    The Yerkes Observatory glass tree is (probably) the tallest in the world. The first Yerkes Observatory glass tree event took place in 2022. By that point, Mack had done his research on tall trees ...

  4. List of largest optical refracting telescopes - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_optical...

    The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.

  5. List of the largest optical telescopes in North America

    en.wikipedia.org/wiki/List_of_the_largest...

    Name/Observatory Location Lens diameter Focal length Built Comments Image Yerkes Observatory [6]: Williams Bay, Wisconsin, USA: 102 cm (40") 19.4 m (62′) 1897

  6. Yerkes 41-inch reflector - Wikipedia

    en.wikipedia.org/wiki/Yerkes_41-inch_reflector

    Yerkes 41-inch reflector is a 40-inch aperture (101.6 cm) reflecting telescope at the Yerkes Observatory, that was completed in 1968. It is known as the 41 inch to avoid confusion with a 40 inch refractor at the observatory. Optically it is a Ritchey–Chrétien design, and the main mirror uses low

  7. Great refractor - Wikipedia

    en.wikipedia.org/wiki/Great_refractor

    The 40-inch (1.02 m) Refractor, at Yerkes Observatory, the largest by famed lens makers Alvin & Clark. The era slowly came to end as large reflecting telescopes superseded the great refractors. In 1856–57, Carl August von Steinheil and Léon Foucault introduced a process of depositing a layer of silver on glass telescope mirrors. Silvered ...