**1. Introduction**

Exploration and utilization of the outer solar system have always been a goal of the planetary science community and spacecraft engineers. Saturn with its fantastic ring system and many diverse moons has been the focus of exploration by the two Voyager flyby missions and the orbiting Cassini spacecraft. These space vehicles have identified areas of great scientific interest and also places on the moons where water, cryogenic ices, and other natural resources can be gathered. Using in situ resource utilization (ISRU) will allow more extensive exploration of the planet and its moons. This chapter presents analyses of the transportation options in the Saturn system, such as nuclear electric orbital transfer vehicles and chemical propulsion

#### *Planetology - Future Explorations*

moon landers. Far future human exploration, using nuclear propulsion is also addressed. A combination of these technologies may allow excellent surveys of the moons and then finally human exploration and perhaps moon base construction.
