Europa's hidden ocean cannot be photographed directly, but several lines of evidence point beneath the ice. Explore the magnetic measurements, surface geology and physical models behind the ocean hypothesis. Inside this episode: - A moon covered in clues - Jupiter keeps squeezing europa - The magnetic signature - What gravity and shape add - Chaos terrain and moving ice Sources include NASA, Induced Magnetic Field from Europa's Subsurface Ocean, USGS, Does Europa have a subsurface ocean?, and NASA, Europa Ocean. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Solar System Fi ...