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abstraction > hypothesis > theory > law > gravity law > Kepler's Law > Kepler's first Law

Kepler's first Law comparison table

Subject	is an instance of	is a kind of	has definition
Kepler's Law		gravity law	One of three orbital laws formulated by Kepler
Kepler's first Law	Kepler's Law		Each planetary orbit is an ellipse with the Sun at one focus.

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