英语词汇“shepherd satellite”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	shepherd satellite
释义	shepherd satellite (also shepherd moon) noun Astronomy A small moon orbiting close to a planetary ring, especially of Saturn, and whose gravitational field confines the ring within a narrow band.For one thing, the particles in some of the rings are corralled into narrow bands by the so-called shepherd moons: teeny satellites that orbit near the rings.... Atlas and other moons exist outside the main ring system, as do the two F ring shepherd moons, Prometheus and Pandora.
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