Moons

New research suggests Uranus' moon Ariel may have once harbored a 100-mile-deep subsurface ocean, indicating the potential for multiple hidden ocean worlds in the Uranian system.

A new study suggests Jupiter's strong magnetic field protected its large moons during formation, while Saturn's weaker field led to only one dominant moon, Titan.

New data from NASA's Juno spacecraft suggests Io's thermal output is significantly higher than previously estimated, potentially by an order of magnitude.