University of Colorado
University of Colorado: Physics 2000: Speed of Light
Using an interesting and intriguing format, this page discusses the question of "How does one measure the speed of light." Explanation focuses on Galileo's and Roemer's efforts to obtain a reasonable value. Also discusses Heinrich...
Rice University
Galileo Project: Ole Christensen Roemer
Factsheet and chronology of Ole Christensen Roemer, who first measured the speed of light.
American Museum of Natural History
American Museum of Natural History: Ole Roemer and the Speed of Light
This resource provides a concise overview of the speed of light and the Ole Roemer, the first man to measure it.
Trinity College Dublin
The History of Mathematics: Roemer
A short biographical sketch of the life and work of Ole Roemer (1652-1719 CE). Identifies his scientific discoveries and contributions in astronomy.
Wolfram Research
Wolfram Science World: Roemer, Olaf
This ScienceWorld site provides a biographical sketch of Olaf Roemer and describes his most notable scientific discoveries such as the first good estimate of the speed of light.