An unsuspecting moon lurking in our solar system has a secret ocean of water that might even ... Uranus' large moons—after Titania, Oberon, Umbriel and Ariel—at about 290 miles in diameter ...

If the moons had benefited from long-term heating, then they could have maintained a thick ocean.' The four biggest ... while those of Ariel and Umbriel may be 19 miles (30 km) deep.

Researchers believe that Miranda, Ariel, Umbriel, Titania ... surface presents a challenge to scientists hoping to reach the ocean and better study it. These moons show evidence of cryovolcanism ...

The recent discovery of a subterranean sea ... three times the size of any ocean, located near earth’s core. It’s possible that water from this enormous reservoir oozed to the surface.

Miranda, the smallest and innermost of Uranus' five moons, once hosted a massive subterranean ocean under its ice shell in the last 500 million years, according to a study published in the ...