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Unformatted text preview: For the orbital periods use the absolute value in days and for the semima jor axes leave the distances in kilometers. (Negative periods imply retrograde motion.) The graph can be computer generated or handwritten on graph paper. Compare with the graph in the Lecture Tutorials, p. 26. Do the natural satellites of Saturn obey Kepler's third law? Explain. Keplers 3 rd law states that, the square of the orbital period of a planet is directly proportional to the cube of the semimajor axis of its orbit. As you can see from the following graph, the moons of Saturn do indeed follow Keplers 3 rd Law. In the graph, the xaxis represents the semimajor axis in km and the y axis represents the orbital period in days. The graph is a scatter plot connected by a line that appears to gradually increase at a steady rate....
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 Spring '11
 NicholasCerrutti
 Astronomy

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