Moons are classed into two separate classes according to their orbits: common moons, which have prograde orbits (they orbit inside the direction in their planets' rotation) and lie near the plane of their equators, and irregular moons, whose orbits could be pro- or retrograde (versus the course in their planets' https://bestmoons16058.elbloglibre.com/34698422/fascination-about-bestmoons