An illustration of an Earth-like planet that is locked with one side always facing its sun, and one side in eternal darkness
Two of Uranus’ moons may have active oceans that are pumping material into space, a new study finds. The realisation came via the discovery of strange features in radiation data collected by NASA’s Voyager 2 spacecraft as it passed the planet almost four decades ago. The new findings, concerning the moons Ariel and Miranda, also support the idea that Uranus’ five largest satellites could have subsurface oceans, a notion suggested by Voyager 2 flyby observations.