How did Neptune’s inner moons form? Clays on Larissa and Galatea, and in the ringsThe researchers wanted to study Neptune’s inner moons to learn more about the planet’s history. The researchers consider the system of ancient moons to be the most likely scenario to explain the current inner moons of Neptune. Bottom line: A new study suggests that Neptune’s inner moons formed when Neptune captured its largest moon Triton and a family of original small icy moons was destroyed. Source: Neptune’s inner moons and rings are exposed icy body interiorsVia CaltechRead more: Are Uranus and Neptune rock giants and not ice giants?