Need to cross the ocean of space with enough oomph and energy to get to Jupiter? Bring in the Navy. That’s what NASA and its Project Prometheus has done by partnering with the Department of Energy’s Naval Reactors (NR) Program. The joint effort, reported last month by SPACE.com, was formally announced March 17. An early target for the collaboration is a space-rated nuclear reactor for the Jupiter Icy Moons Orbiter (JIMO) mission. JIMO will visit Jupiter's three icy moons, Ganymede, Callisto and Europa. NR brings 50-plus years of practical experience in compact, long-lived reactor systems carried on submarines and aircraft...