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Astronomy and Astrophysics University of Illinois Observatory

University of Illinois Observatory

University of Illinois Observatory — Urbana, Illinois.
12-inch Refractor, 1987.
(Photo Credit: Dr. John Dickel)

University of Illinois Observatory — Urbana, Illinois.
Photoelectric Photometer mounted on the 12-inche Refractor, 1913.
(Photo Credit: Dr. John Dickel)

University of Illinois Observatory — Urbana, Illinois.
Selenium cell Photometer on the 12-inch Refractor, 1910.
(Photo Credit: Dr. John Dickel)

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