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Definition of Shepherd moon
1. Noun. A small moon that orbits near the outer edges of a planetary ring or within gaps in the ring. The edge of the ring remains sharply defined owing to the gravity of shepherd moons. ¹
¹ Source: wiktionary.com
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1. Noun. A small moon that orbits near the outer edges of a planetary ring or within gaps in the ring. The edge of the ring remains sharply defined owing to the gravity of shepherd moons. ¹
¹ Source: wiktionary.com