🔭 Yerkes Observatory

United States · Americas · 42.57°N, 88.56°W

The Yerkes Observatory is an astronomical observatory in Williams Bay, Wisconsin, United States. Founded in 1897, it houses the world's largest refracting telescope in the world, with a doublet-lens aperture of 40 inches (100 cm). It was initially operated by the University of Chicago Department of Astronomy and Astrophysics from its founding until 2018, after which ownership was transferred to the non-profit organization Yerkes Future Foundation (YFF) in May 2020, which began heavy restoration and renovation of the historic buildings and grounds. Yerkes re-opened for public tours and programming in May 2022.

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Quick facts

Country	United States
Continent / region	Americas
Coordinates (approx.)	42.57°N, 88.56°W · view on map

Yerkes Observatory is located in United States, in Americas.

More observatories in United States

Adolphson Observatory · Allegheny Observatory · Anderson Mesa Station · Angell Hall Observatory · Apache Point Observatory · Apollo Observatory · Arecibo Observatory · Ashton Observatory · Astronaut Memorial Planetarium and Observatory · Astronomical Observatory (University of Illinois Urbana-Champaign).

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