Why most of the rotating objects, rotate at the equation plane of its center?
first of all, I think if you look at the surrounding system, you will see that most objects tend to have similar angular momentum directions in the solar system (and galactic system, etc) because they were made out of the same cloud of gas and dust originally that all had more or less a homogeneous angular movement (anything that has a drastically different angular momentum would have been changed by collisions with the background particles). So even if the rings came from multiple moons or larger chunks of material originally, those moons would have been orbiting in the same direction. But not exactly the same direction and speed. So imagine you have material that is generally orbiting counterclockwise around saturn and colliding and breaking up. This would go along just fine with the general angular momentum of things in our solar system. But over time, things that are in slightly different planes of orbit would collide. Over time, that energy of collisions would either throw out the
