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.
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.