Yerkes Observatory – Williams Bay, Wisconsin - Atlas Obscura
Homepage - Yerkes Observatory
Yerkes Observatory - On November 30, 1901, astronomer and telescope maker, George Willis Ritchey, observes the heavens through the double slide-plate holder attached to the Yerkes 40-inch Refractor Telescope. ✨🔭 #YerkesObservatory #Astronomy #
Yerkes Telescope
Wisconsin 101
Yerkes Future Foundation has big plans for Yerkes Observatory - Chicago Sun-Times
48 Yerkes Observatory Photos and Premium High Res Pictures - Getty Images
Yerkes Observatory - Wikipedia
A Tour of the Famed Yerkes Observatory | Amateur Astronomers Association of Princeton
An end of an era at Yerkes Observatory
Today's A Big Day': Wisconsin's Yerkes Observatory Has New Ownership | Wisconsin Public Radio
Wisconsin 101: Yerkes Telescope And The Birthplace Of Astrophysics - Wisconsin Life
Yerkes Observatory - Wikipedia
Yerkes Observatory aims for resurrection as school for astronomy – Chicago Tribune
Visual Observing With The 40-Inch Yerkes Refractor
Yerkes Observatory - Wikipedia
Refracting telescopes: Use lenses (refraction); Important concepts are focal length and apert… | Astronomical observatory, Astronomical telescope, Largest telescope
Yerkes Observatory Williams Bay Telescope Photograph by Tom Jelen - Fine Art America
Discover Yerkes Observatory, largest refracting telescope - YouTube
Wisconsin's Yerkes Observatory—stargazing through the world's largest refracting telescope
Wisconsin's Yerkes Observatory—stargazing through the world's largest refracting telescope
Williams Bay trying to maintain Yerkes Observatory as education center
Yerkes Observatory
