The law of equal areas suggests that planets move fastest when at and slowest when at .

The law of equal areas suggests that planets move fastest when at "perihelion" at slowest when at the "aphelion." Perihelion refers to the point at a planet's orbit, comet or asteroid where it is closest to the sun. Aphelion refers to the point at a planet's orbit, comet or asteroid where it is furthest to the sun.

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