Before Cassini, the 1) (astronomers) could have only brief glimpses of the discoveries awaiting us at Saturn. Pioneer 11 and Voyagers 1 and 2 conducted flybys decades earlier, taking pictures, measurements and observations as they zoomed past. These missions shed new light on Saturn's complicated 2) (ring) system, discovered new 3) (moons) and made the first measurements of Saturn's magnetosphere. But these quick encounters didn't allow time for more extensive scientific research of the 4) (planet). Cassini changed all that. The 5) (spacecraft) began the first in-depth, up-close study of Saturn and its system of rings and moons in 2004. It became the first spacecraft to 6) (orbit) Saturn, beginning a mission that yielded troves of new insights over more than a decade, which could never have been achieved with 7) (telescopes). The Saturnian system proved to be rich ground for exploration and discoveries, and Cassini's science findings changed the course of future planetary 8) (exploration).