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Uranus's small moons are dark, red, and water-poor

The solar system's oddball planet has some pretty odd moons, too. The first infrared spectra of Uranus's small inner moons, ...
SETI

The Hidden Ocean of Ariel: Tidal Forces and the Case for a Watery Past

New research suggests that Ariel, a moon of Uranus, might have once harbored an ocean about 170 km deep. Credit: NASA/JPL-Caltech/PSI/Mikayla Kelley/Peter Buhler ...