In 7982, use the fact that the orbit of a planet about the
Chapter 11, Problem 79(choose chapter or problem)
In 7982, use the fact that the orbit of a planet about the Sun is an ellipse, with the Sun at one focus.The aphelion of a planet is its greatest distance from the Sun, and the perihelion is its shortest distance.The mean distance of a planet from the Sun is the length of the semimajor axis of the elliptical orbit. See the illustration.
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