National Historic Landmark plaque
Title
National Historic Landmark plaque
Subject
astronomy, observatory
Description
The University of Illinois Observatory is historically significant for the development of selenium and photoelectric cell photometry that revolutionized the measurement of celestial magnitudes. The determination of stellar magnitudes is one of the most fundamental measurements in astronomy. During the years from 1907 to 1922, Observatory director Joel Stebbins worked with physicists F.C. Brown, W.F. Schulz, and Jakob Kunz to develop and refine electric photometry.
In 1989, the United States Department of the Interior designated the Observatory and National Historic Landmark.
In 1989, the United States Department of the Interior designated the Observatory and National Historic Landmark.
Creator
United States Department of the Interior
Publisher
Astronomy Department, University of Illinois, Urbana, Illinois
Date
1989
Contributor
Michael Svec
Rights
Copyright Michael Svec
Format
image/jpg
Language
English
Type
physical object
Coverage
University of Illinois Observatory, Urbana, Illinois
Files
Citation
United States Department of the Interior, “National Historic Landmark plaque,” University of Illinois Observatory Collection, accessed March 28, 2024, https://uiobservatory.omeka.net/items/show/28.