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abstraction > hypothesis > theory > law > gravity law > Kepler's Law > Kepler's third Law
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Kepler's third Law comparison table
Subject has definition has equation has synonym is a kind of is an instance of
Kepler's LawOne of three orbital laws formulated by Kepler  gravity law 
Kepler's third LawThe square of the period is proportional to the cube of the distance.P2 = 4π2 a3 / [G (m1 + m2)]harmonic law Kepler's Law

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