The Moon System Generator creates a system of semi-plausible moons around any planet (but works the best with gas giants as of this version.) It is advised to simulate any system created with this generator in a gravity simulator such as Universe Sandbox or Gravity Simulator.

To generate moons, four key factors are first required in order to best ensure scientific plausibility:

Parent star mass: Suns (M☉) Jupiters (M♃) Earths (M⊕)
Planet mass: Jupiters (M♃) Earths (M⊕)
Planet radius: km m
Planet Semi-Major Axis: AU Gm (million km) km m

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