The Galileo and Cassini missions to Jupiter and Saturn have greatly deepened our understanding of those giant planets and their intriguing moons. But they have also raised more questions. With Cassini nearing the end of its lifetime, it is time to plan the next flagship-class mission to the outer planets. Three mission concepts are currently under study for a new mission to launch in the 2016-17 time frame, with a selection of mission concept and destination expected at the end of this year.

Information about the three candidates can be found at the Outer Planets Assessment Group.

Missions supporting this program:

• Cassini
• Galileo
• Viking 1-2
• Voyager