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Measuring times of the eclipses of Jupiter's moons when Earth and Jupiter were in various positions gave evidence for light traveling at a finite speed. Includes a list of measurements of c made ...
Diagram showing forces of attraction with planet alignment.
In 1676, Ole Roemer made the first accurate measurement of the speed of light using Jupiter's moons. His estimate was 140,000 miles/second.
Details of how large planets have been detected around three other solar type stars. Understanding Doppler wobble aided by an exercise.
Roemer's observations of the periods of Jupiter's moon allowed the first estimate of the speed of light. A good site relevant to all college students.
A site containing details of the Galileo project and the results received in this mission to study the atmosphere of Jupiter.
Java animation showing the motion of the planets of the solar system, moons of Jupiter and two comets.
Details of the experiment conducted to determine the speed of light including Ole Römer's observation with an eclipse of Io, Jupiter's moon.