4 of the largest Uranus moons could have oceans: NASA

NASA scientists have analysed data from Voyager spacecraft and computer modelling to determine that four of Uranus' biggest moons may have an ocean layer between their icy crusts and cores. The study examined the structure and composition of all five biggest moons - Miranda, Ariel, Titania, Umbriel, and Oberon. According to researchers, these oceans could be dozens of kilometres deep.