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Yerkes observatory University of Chicago in Williams Bay Wisconsin
Georg Ellery Hale, an American astronomer, the leader of construction of telescopes at Yerkes observatory, Palomar observatory, a hand drawn portrait by a marker
Detail of stone work of the Yerkes Observatory University of Chicago in Williams Bay Wisconsin
Yerkes observatory uninversity of Chicago in Williams Bay Wisconsin
A wide shot of the Yerkes Observatory under cloudy sky in winter in Williams Bay, Wisconsin, USA
Beautiful Winters shot of the Historic Yerkes Observatory
observatory

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