Collision is the world rule that breaks two bodies apart when they meet hard enough. Two bodies in a system may collide when they come close enough for their sizes and the impact would be hard enough to beat their hardness. The impact's energy is the smaller body's mass times the speed at which they meet, and the chance of a collision grows with it.
Effects
- Each body with more than one layer breaks. A body with one layer has nothing inside to break open and stays whole.
- The surface layer becomes debris on the broken body's orbit. Ships, stations and moons at the body move to the debris.
- The deeper layers are shared among fragments on orbits just inside and outside the old one, exposing the core.
- The impact warms every piece in proportion to its energy, so fresh fragments are hot for a while and cool by Radiating.