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| abstraction > hypothesis > theory > law > gravity law > Kepler's Law > Kepler's second Law | 
| Kepler's second Law comparison table | ||||
| Subject | has definition | 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 second Law | Equal areas are swept out in equal times. | law of areas | Kepler's Law | 
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