1. If it is reasonable to expect fewer collisions over time, as earlier collisions eject some objects from the belt and remaining objects settle into "safer" orbits?
2. Whether collisions cause objects to break apart such that subsequent collisions are with smaller objects, which then leave fewer discernible impacts?
3. Whether the temperature changes induced by Pluto's orbit--which cause the methane ice to move between the atmosphere and the surface--would cause a smoothing effect over time; e.g. craters being filled by reforming ice?
1. If it is reasonable to expect fewer collisions over time, as earlier collisions eject some objects from the belt and remaining objects settle into "safer" orbits?
2. Whether collisions cause objects to break apart such that subsequent collisions are with smaller objects, which then leave fewer discernible impacts?
3. Whether the temperature changes induced by Pluto's orbit--which cause the methane ice to move between the atmosphere and the surface--would cause a smoothing effect over time; e.g. craters being filled by reforming ice?