The Diversity of Outer Planetary Systems

---

Who Cares?

• Outer planetary systems are intrinsically interesting.
  • Startling extra-solar planetary systems!
    

• They also are important in the:
  • impact rates on terrestrial planets.
  • delivery of volatiles to terrestrial planets.
  • stability of terrestrial planetary systems.
  • the structure of Zodiacal dust cloud.
    • effects the TPF.