Voyager 2 detected no such signs then ... Now, scientists suspect that two of Uranus’s outer moons, Titania and Oberon, may have liquid water oceans beneath their surfaces.

Voyager 2 gave us the only close-up images of Titania when it flew past Uranus in 1986. The pictures showed many geological features, hinting that the moon may have been more active in the past.

How can Uranus be used to indirectly study its moons and identify if they possess subsurface oceans? This is what a recent ...