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 Obsevatory, still the world's largest refractor? - Observatories - Cloudy Nights
Discover Yerkes Observatory, largest refracting telescope - YouTube
Homepage - Yerkes Observatory
1897 Yerkes Telescope 40 inch refractor astronomical observatory University of Chicago Williams Bay, Wisconsin Stock Photo - Alamy
The (Almost) Re-Opening of the Yerkes Observatory - Sky & Telescope - Sky & Telescope
Homepage - Yerkes Observatory
Yerkes Observatory - Wikipedia
Yerkes Observatory: Home of Largest Refracting Telescope | Space
Yerkes Observatory: Restoring the World's Largest Refracting Telescope - Grainger KnowHow
:max_bytes(150000):strip_icc()/YerkesInside-2000-791d3a15d42d48399db0da013509620a.jpeg "America's Most Historic Observatory Is Reborn—And Open for Tours")
America's Most Historic Observatory Is Reborn—And Open for Tours
Wisconsin's Yerkes Observatory—stargazing through the world's largest refracting telescope
Yerkes Observatory - All You Need to Know BEFORE You Go (with Photos)
Urban spelunking: Yerkes Observatory, which will soon reopen to the public
New stewards for Yerkes Observatory offer expanded vision - Washington Times
Wisconsin 101: Yerkes Telescope And The Birthplace Of Astrophysics - Wisconsin Life
Homepage - Yerkes Observatory
Yerkes Observatory | Operating the World's Largest Refracting Telescope - YouTube
Yerkes Observatory | Williams Bay WI
Yerkes 41-inch reflector - Wikipedia
A Visit to Yerkes Observatory
Williams Bay trying to maintain Yerkes Observatory as education center
Visual Observing With The 40-Inch Yerkes Refractor
Homepage - Yerkes Observatory
Wisconsin 101
Yerkes Observatory - Wikipedia
