The Grandeur of Ganymede: Suggested Goals for an Orbiter Mission

Ganymede is an icy satellite of planetary grandeur, with alluring surface geology and chemistry, an internally generated magnetic field, a differentiated interior and hot iron core, and a tenuous but dynamic atmosphere. Its linked surface, interior, and orbital evolution recount the history of the jovian system. Moreover, an induced magnetic field component and warm interior imply a liquid water deep within the moon, and the potential for harboring primitive life. Broad goals of surface, magnetosphere, interior, and atmosphere--and overarching themes of water and organics--tie to high priority to NASA's exploration objectives. All can be thoroughly addressed by a dedicated Ganymede mission. Additional information is contained in the original extended abstract.