| 单词 | Kepler's law of planetary motion |
| 释义 | Kepler's law of planetary motion (extremely rare) n WORD FAMILY Kepler's law of planetary motion n (astronomy) one of three empirical laws of planetary motion stated by Johannes Kepler Syn|Hypo|Hyper Kepler's law 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 areasa law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times Kepler's third law, harmonic lawa 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 law, law of nature a generalization that describes recurring facts or events in nature |
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