NASA's Voyager 2 spacecraft flew by Uranus in 1986 on its never-ending journey through space - returning to Earth with the only close-up images we have of the ice giant and its moons.
Now, another look at data collected nearly 40 years ago suggests that two of the planet's moons may have active oceans beneath their frozen surfaces.
Astrobiologists believe that moons like Jupiter's Europa or Saturn's Enceladus could be strong candidates to support alien life, because of their underground oceans.
If liquid oceans are proven to exist beneath the surface of Uranus' moons, they could be added to the list of possible hosts for life.
Scientists believe that Miranda and Ariel may be spewing plumes of steam - which on other moons in the solar system are thought to come from subsurface oceans.
