The fact that many of the larger Jovian moons orbit nearly in the equatorial plane of their host world, moving in the same direction as their planet's spin, suggest that they

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The fact that the larger Jovian moons orbit nearly in the equatorial plane of their host world suggests that they formed from a rotating disk of gas and dust, just like a miniature solar system. This is consistent with the theory of planetary formation, which suggests that a rotating disk of material around a young star can give rise to the formation of planets and their moons through accretion.

The Fact That Many of the Larger Jovian Moons Orbit