Yerkes Observatory aims for resurrection as school for astronomy – Chicago Tribune
Yerkes Telescope Construction and Use – Wisconsin 101 Our History in Objects – UW–Madison
Yerkes 40-inch Refractor Telescope Photograph by Yerkes Observatory, University Of Chicago, Courtesy Emilio Segre Visual Archives/american Institute Of Physics
An end of an era at Yerkes Observatory
Yerkes Observatory's mission: to stay open – Twin Cities
The Great Yerkes Telescope, Chicago University, USA (Print #14127720)
Wisconsin 101: Yerkes Telescope And The Birthplace Of Astrophysics - Wisconsin Life
Wisconsin's Yerkes Observatory—stargazing through the world's largest refracting telescope
Yerkes Observatory - Wikipedia
/arc-anglerfish-arc2-prod-tronc.s3.amazonaws.com/public/VI7JY4HFUVAH5OK7ITY36LIXYQ.jpg "Closed for months, historic space observatory once again has a bright future after U. of C. donation - Chicago Tribune")
Closed for months, historic space observatory once again has a bright future after U. of C. donation - Chicago Tribune
Wisconsin's Yerkes Observatory—stargazing through the world's largest refracting telescope
History of Yerkes | Yerkes Observatory
Astronomy in the 1900s – Wisconsin 101 Our History in Objects – UW–Madison
/cdn.vox-cdn.com/uploads/chorus_image/image/66997221/AP20176536919890.0.jpg "Yerkes Future Foundation has big plans for Yerkes Observatory - Chicago Sun-Times")
Yerkes Future Foundation has big plans for Yerkes Observatory - Chicago Sun-Times
Yerkes Telescope Construction and Use – Wisconsin 101 Our History in Objects – UW–Madison
Yerkes Observatory Lives On as the Largest Refractor Telescope Ever Built | Astromart
40 inch refracting telescope at Yerkes Observatory in Williams Bay, Wisconsin Stock Photo - Alamy
Yerkes Observatory « Observatories and Instruments
Yerkes Observatory is closing its doors | Astronomy.com
Visual Observing With The 40-Inch Yerkes Refractor
Yerkes Observatory - Wikipedia
Telescope At Yerkes Observatory Photograph by Royal Astronomical Society/science Photo Library
Yerkes Observatory – Williams Bay, Wisconsin - Atlas Obscura
China Is Building The World's Largest Refractor Telescope To Search For Near-Earth Asteroids
