The European Space Agency’s long-awaited Juice Mission is about to blast off for Jupiter’s moons. Its goal: to find out whether the oceans below their icy surfaces could be capable of supporting life. Madeleine Finlay speaks to Dr Stuart Clark about why moons are the new Mars for scientists seeking life, how magnetic fields can help us understand these mysterious lunar oceans, and what Juice might mean for our understanding of life beyond the solar system. Help support our independent journalism at theguardian.com/sciencepod