40-inch Refractor

USA / Wisconsin / Williams Bay /
 observatory, telescope
This dome houses a 40-inch refracting telescope, the largest of its kind in the world. A refracting telescope uses glass lenses rather than the more common reflecting telescope which uses a curved metal mirror.

www.yerkesobservatory.org/our-legacy/
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Wikipedia article: http://en.wikipedia.org/wiki/File:Yerkesobservatoryfromair.jpg
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Coordinates:   42°34'13"N   88°33'22"W
This article was last modified 5 years ago