| 单词 | meteor cloud |
| 释义 | > as lemmasmeteor cloud meteor cloud n. Astronomy (a) a region of interplanetary space with a high density of meteoroids; †(b) a cloud-like trail left by a meteor during its passage through the atmosphere (obsolete). ΚΠ 1885 Cassell's Encycl. Dict. V. i. 24/3 Meteor-cloud, an expanse of space thickly studded with meteors or meteoric particles. 1890 Cent. Dict. Meteor cloud, a cloud-like train left by a meteor in the upper air. 1984 Solar Syst. Res. 18 87 It is shown that some short-period meteor swarms may arise as a result of gravitational focusing of the orbits of the circumsolar meteor cloud under the effect of secular perturbations by the giant planets. < as lemmas |
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