| NOUN | cognition | Kepler's law of planetary motion, Kepler's law | (astronomy) one of three empirical laws of planetary motion stated by Johannes Kepler |
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| Meaning | (astronomy) one of three empirical laws of planetary motion stated by Johannes Kepler. | |
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| Synonym | Kepler's law | |
| Category | astronomy, uranology | The branch of physics that studies celestial bodies and the universe as a whole |
| Narrower | Kepler's first law | A law stating that the orbit of each planet is an ellipse with the sun at one focus of the ellipse |
| Kepler's second law, law of areas, law of equal areas | A law concerning the speed at which planets travel | |
| Kepler's third law, harmonic law | A law stating that the ratio of the square of the revolutionary period (in years) to the cube of the orbital axis (in astronomical units) is the same for all planets | |
| Broader | law, law of nature | A generalization that describes recurring facts or events in nature |
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