By the end of the year, NASA will decide on a new New Frontiers-class mission. This medium-cost mission class is responsible for the Juno, New Horizons, and OSIRIS-REx probes, and has a handful of finalists selected for a mid-2020s launch. Among proposals for a Moon mission, a Venus lander, and a comet sample return are five Saturnian missions.
The first one is a plunge directly into Saturn, studying the interior of the planet’s cloud layers as it moves down. Cassini performed a sort of i