21. The Water Plumes of Europa
Jupiter’s moon Europa is famous for its suspected subsurface ocean, but recent observations by the Hubble Space Telescope revealed water plumes erupting from its surface. These plumes provide an extraordinary opportunity for future missions to sample the ocean’s chemistry without having to drill through miles of ice. Scientists hope to detect organic molecules or even biosignatures in these jets, bringing us closer to discovering life beyond Earth. Learn more from NASA.