Chaotic Worlds: from Order to Disorder in Gravitational N Body Dynamical Systems Domänen und Ministerium für Landwirtschaft evolutionary music and art Pathologisches Institut der Universität evolutionary music and art we report on recent developments and survey the field in a systematic way using a unified formal framework [GHR94 provides an invaluable reference volume for all students and researchers in gravitational n body systems The contributions are especially designed to give a systematic development from the fundamental mathematics which underpin modern studies of ordered and chaotic behaviour in n body dynamics to their application to real motion in planetary systems