Kepler identified that the next electricity of a planet’s time period is proportional to the third ability of the semi-key axis of the planet’s trajectory. The farther a planet is, the for a longer period its revolution time. Mathematically expressed P ^ 2 / A ^ 3 = consistent. The interval (P) is the time wanted to circle the Sun in 1 revolution, A is the length of the semi-important axis.
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