The 40-inch telescope from the inside. Feature Summary

Type:
From Physics Research
Title:
40-inch Refracting Telescope
Description:
This photo (hi-res image) shows the moon, looking along the 40-inch refracting telescope at the Yerkes Observatory. Its focal length is long--about 19 meters--so the real image it makes will be big. This is the world's largest refractor.

(This feature was updated on July 15, 2013.)
Image:
photo credit: Yerkes Observatory; <a href="http://astro.uchicago.edu/vtour/40inch/moonalong40inch.jpg" target="_blank">image source</a>
photo credit: Yerkes Observatory; image source
Image URL:
http://www.physicstogo.org/images/features/Yerkes40inch-7-12-07--large.jpg
Featured:
July 16, 2007 - August 1, 2007