ElPelado wrote:what is the "prometheus project"?
and JIMO is the project of sending a prove to Europa?
Project Prometheus is a project that NASA launched last year (I think) to develop nuclear power systems for interplanetary spacecraft. Proper nuclear fission too, not just RTG's like we have on Cassini/Galileo etc.
JIMO is the Jupiter Icy Moons orbiter, which is supposed to launch in 2011. It will take 5 years to spiral out to jupiter's orbit, using Ion propulsion powered by a nuclear fission reactor. When it gets there, it'll orbit Callisto, Ganymede & then europa, before it's eventually killed by Jupiter's radiation belts (How ironic...) While it's working, it'll radar map all of the 3 moons, and send back ultra hi-res surface images. It might also carry a probe to land on europa, but i'm not sure about that...
Pretty cool mission all in all though!