Rings have a natural tendency to spread radially, the outer edge recedes from the planet, and the inner edge contracts, unless restrained by gravitational interactions from satellites further out.
Particles on the inner edge, for a ring system around earth, would burn up in the atmosphere in a very slow but steady drizzle. Around an airless body like our moon, the inner edge can do more interesting things,
Particles on the inner edge, for a ring system around earth, would burn up in the atmosphere in a very slow but steady drizzle. Around an airless body like our moon, the inner edge can do more interesting things,
