In 2013, the Hubble Space Telescope spotted water vapor on Jupiter's moon Europa. The vapor was evidence of plumes similar to the ones on Saturn's moon Enceladus. That, and other compelling ...

Saturn's Titan and Jupiter's Europa—and their potential to harbor life. More information: Colin R. Meyer et al, A Potential Mushy Source for the Geysers of Enceladus and Other Icy Satellites ...