This site contains information concerning early measurements of the speed of light. This site describes Galileo's attempts with lanterns and Roemer's observations of Jupiter's moon Io. An image and animation is included.
University of Colorado. Measuring the Speed of Light. Boulder: University of Colorado, September 20, 1999. http://www.colorado.edu/physics/2000/waves_particles/lightspeed_evidence.html (accessed 25 April 2015).
%0 Electronic Source %D September 20, 1999 %T Measuring the Speed of Light %I University of Colorado %V 2015 %N 25 April 2015 %8 September 20, 1999 %9 text/html %U http://www.colorado.edu/physics/2000/waves_particles/lightspeed_evidence.html
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