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SlideshowReport

The Largest Refracting Telescope

Description
This giant refracting telescope, built in the late 1800s, is housed at Yerkes Observatory near Chicago. The objective lens is 102
cm (40 in.) in diameter, and the telescope tube is 19 ⅓ m (63 ½ ft) long. (Yerkes Observatory)
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2 Comments
10 years ago
Thanks for posting this informative picture.
8 years ago
Is it still functional?
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