Above: Enceladus, an ocean world covered in ice.Our solar system is awash* with ocean worlds. And thanks to the Cassini missionary we've gotten to know one, Enceladus a 500km wide moon of Saturn, really well.So what's it ocean like?Dark - the ocean's covered in 20km of ice - but maybe not totally black: There's volcanic activity on the ocean floor, possibly like the white smoker vents of Earth, so there'd be the dim carmine glow of volcanism. More importantly the salty, alkaline, water contains organic chemicals and hydrogen - food for possible micro-life.Cassini's mission is over - but its now hard to imagine us not returning to Enceladus....*Sorry. You've read our science facts - have you tried our science fiction? You can pick up our book on Kindle, or as a paperback, by following this link......or, if you'd like to help us do things like podcasts, animations, and videos here why not...UAbove: The geysers of Enceladus, backlit: The ocean is literally leaking into space!