Dermott and Gold proposed a resonance-based theory for the confinement of one set of these types of structures, while Lissauer explained the azimuthal confinement of another set of these structures by positing their discontinuity and their locations at the L4 and L5 Lagrange points.
hese types of structures are eroded by meteor bombardment at a rate of about 10 to the minus 3 centimeters per year, as well as by some of their constituent parts being siphoned off via Poynting-Robertson drag. Dermott and Gold proposed a resonance-based theory for the confinement of one set of these types of structures, while Lissauer explained the azimuthal confinement of another set of these structures by positing their discontinuity and their locations at the L4 and L5 Lagrange points. Goldreich and Tremaine proposed a torque-exchange model of these types of structures in which their radial confinement is achieved via a shepherding mechanism. These types of structures may be formed from a progenitor that drifts into the Roche limit and is broken up by tidal forces, and one example of these types of structures contains the satellite Pan, which causes the Encke gap. For 10 points, identify these structures that surround giant planets such as Uranus, Saturn, and Jupiter.
hese types of structures are eroded by meteor bombardment at a rate of about 10 to the minus 3 centimeters per year, as well as by some of their constituent parts being siphoned off via Poynting-Robertson drag.
planetary rings [prompt on any specific ring system, e.g. "Saturn's rings" or "Jupiter's rings"]