| 单词 | kepler's laws |
| 释义 | > as lemmasKepler's laws Kepler's laws n. (see law n.1 17c(a)).extracted from Keplern.Kepler's laws Kepler's laws n. the three propositions established by John Kepler (1571–1630) with regard to the planetary motions: (1) That the planets move in ellipses, the sun being in one of the foci; (2) That the radius vector of a planet describes equal areas in equal times; (3) That the square of the periodic time of a planet is directly proportional to the cube of its mean distance from the sun.extracted from lawn.1< as lemmas |
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