Question: Keplers third law of planetary motion states that the square of the period of any planet is proportional to the cube of the mean radius

Kepler’s third law of planetary motion states that the square of the period of any planet is proportional to the cube of the mean radius (about the sun) of that planet, with the constant of proportionality being the same for all planets. Using the fact that the period of Earth is 1 year and its mean radius is 93.0 million miles, calculate the mean radius for Venus, given that its period is 7.38 months.

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