the proposed Jupiter Icy Moons Orbiter requires the development
and testing of many new technologies, the mission would
not launch until 2011 or later.
mission is currently proposed, a heavy lift launch vehicle
would lift the spacecraft into high Earth orbit. The ion-propulsion
thrusters would spiral the spacecraft away from Earth and
then on its trip to Jupiter.
entering orbit around Jupiter, the spacecraft would orbit
Callisto, then Ganymede, and finally Europa. The intensity
of the radiation belts at Europa limits how long a spacecraft's
electronics are able to operate in orbit around Europa,
even with advances in radiation-resistant electronics that
would be used on this mission.
Mission Fact Sheet