IAU Symposium 263 provides a state-of-the-art review of icy bodies in the Solar System, a topic crucial to understanding processes involved in the Solar System's formation, the consequences for water on planets, and ultimately, the habitable zones around other stars. Ice-rich planetesimals which form beyond the snow line are discussed, using an interdisciplinary approach. The main topics covered include: accretion of icy grains in the protoplanetary disk, the long-period comet flux and the Oort cloud population, transfer mechanisms of bodies from their source regions to the Sun's neighborhood, the physics and dynamics of Trans-Neptunian Objects, transition objects (comets and asteroids), cryovolcanism and modeling the interiors of icy bodies, and a review of past, present, and future space missions. This volume gives a broad overview of the importance of these bodies, from comets up to liquid water on terrestrial planets, and the formation of ices in the Solar SystemProceedings of the International Astronomical Union Editor in Chief: Dr. Ian F. Corbett This series contains the proceedings of major scientific meetings held by the International Astronomical Union. Each volume contains a series of articles on a topic of current interest in astronomy, giving a timely overview of research in the field. With contributions by leading scientists, these books are at a level suitable for research astronomers and graduate students.