Определение shepherd moon в Английский Язык Английский Язык словарь
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
(Astronomi) (Also shepherd satellite) A small moon orbiting close to a planetary ring, especially of Saturn, and whose gravitational field confines the ring within a narrow band