Europa Report: An Epic Voyage to Jupiter's Moon (Review)
Ultimately, about eight instruments would be chosen to fly on a satellite that would either put itself into orbit around Europa or make multiple flybys. The mission, which NASA hopes to do for less than $1 billion plus the cost of a rocket ride, would launch sometime in the 2020s.
Top science objectives for the mission are to:
Characterize the extent of the ocean and its relation to the deeper interior;
Characterize the ice shell and any subsurface water, including their heterogeneity, and the nature of surface-ice-ocean exchange;
Determine global surface, compositions and chemistry, especially as related to habitability;
Understand the formation of surface features, including sites of recent or current activity, identify and characterize candidate sites for future detailed exploration; and Understand Europa's space environment and interaction with the magnetosphere.