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| abstraction > hypothesis > theory > law > gravity law > Kepler's Law > Kepler's third Law | 
| Kepler's third Law comparison table | |||||
| Subject | has definition | has equation | has synonym | is a kind of | is an instance of | 
|---|---|---|---|---|---|
| Kepler's Law | One of three orbital laws formulated by Kepler | gravity law | |||
| Kepler's third Law | The 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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