![Saturn's moon Rhea looms "over" a smaller and more distant Epimetheus.](https://appel.nasa.gov/wp-content/uploads/2011/02/2a-670x380.jpg)
The Path to Scientific Discoveries: Designing the Cassini Solstice Mission Trajectory
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By Brent Buffington Cassini-Huygens, a joint mission between NASA, the European Space Agency, and the Italian Space Agency, has roamed the Saturnian system for the better part of six and a half years.