What are some of Neptune’s major moons?
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Triton is Neptune’s largest moon; it was discovered soon after Neptune itself was found. The second Neptunian moon to be discovered was Nereid, and that did not happen until 1949. It was discovered by the Dutch American astronomer Gerard Kuiper. During its 1989 flyby of Neptune, the Voyager 2 found six other moons, ranging in size from 3 miles (50 kilometers) to 250 miles (400 kilometers) across. Several more have been discovered since then, all of them very small.