Yerkes Observatory | observatory, Williams Bay, Wisconsin, United States | Britannica
Yerkes Observatory | observatory, Williams Bay, Wisconsin, United States | Britannica
Today's A Big Day': Wisconsin's Yerkes Observatory Has New Ownership | Wisconsin Public Radio
Yerkes Observatory is closing its doors | Astronomy.com
Homepage - Yerkes Observatory
Wisconsin's Yerkes Observatory—stargazing through the world's largest refracting telescope
The (Almost) Re-Opening of the Yerkes Observatory - Sky & Telescope - Sky & Telescope
The Not-Quite Closing of Yerkes Observatory - Sky & Telescope - Sky & Telescope
Refracting telescopes: Use lenses (refraction); Important concepts are focal length and apert… | Astronomical observatory, Astronomical telescope, Largest telescope
Inside The Yerkes Observatory: U Of C's 'Cathedral Of Science' | WBEZ Chicago
Homepage - Yerkes Observatory
Giant telescopes able to probe deeper into space - The Daily Gazette
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 Observatory aims for resurrection as school for astronomy – Chicago Tribune