Beyond the orbit of Neptune is the realm of the icy worlds, ranging in

size from Triton, the giant moon of Neptune, and the dwarf planets Pluto

and Eris, all the way down to the nuclei of comets. This lecture

discussed the icy bodies of the Trans-Neptunian regions of the Solar

System, discussing the basic properties of Triton (the best studied such

object), Pluto, Eris, and the Kuiper Belt, introducing the dynamical

families of Trans-Neptunian Objects that record in their orbits the slow

migration of Neptune outwards during the early history of the Solar

System. The Kuiper Belt is the icy analog of the main Asteroid Belt of

the inner Solar System: both are shaped by their gravitational

interaction with giant gas planets (Jupiter for the asteroids, Neptune

for the KBOs), and are composed of leftover raw materials from the

formation of their respective regions of the Solar System. Recorded

2006 Nov 28 in 100 Stillman Hall on the Columbus campus of The Ohio

State University.