Studying how much the Uranian moons sway in orbit may reveal whether or not they have oceans inside of them. NASA is in the early stages of planning a mission to do just that.

Are there hidden oceans inside the moons of Uranus? Their wobbles could tell us

Source: space
Source Link: https://www.space.com/the-universe/uranus/are-there-hidden-oceans-inside-the-moons-of-uranus-their-wobbles-could-tell-us