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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.
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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.
At Yerkes Observatory he was the successor to the late E. E. Barnard, inheriting Barnard's collection of photographic plates. Ross decided to repeat the same series of images and compare the results with a blink comparator. In doing so, he discovered 379 new variable stars and over 1000 stars of high proper motion.
Name/Observatory Aperture cm (in) Type Location then (Original Site) Extant* Yerkes Observatory [6] 102 cm (40") achromat: Williams Bay, Wisconsin, USA: 1897 James Lick telescope, Lick Observatory: 91 cm (36") achromat: Mount Hamilton, California, USA: 1888 Crossley Reflector [13] 91.4 cm(36") reflector – glass: Lick Observatory, California ...
Tombaugh's interest in astronomy appears to have begun when he visited the Yerkes Observatory in Lake Geneva, Wisconsin when he was 12 years old in 1918. His uncle Lee also helped spark his interest in astronomy as he was an amateur astronomer who used a 3-inch (76 mm) diameter non-achromatic refractor telescope and gave him several astronomy ...
From classic shining stars to cuddly animals to Santa Claus motifs, these are the Christmas tree topper ideas to add into your holiday decor for 2023.
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