Observations of how Titan warps as it orbits Saturn provides strong evidence for a liquid ocean buried under the surface of the gas giant's largest moon.
New observations show that Titan warps during the gravitational tides it experiences, suggesting an ocean sloshes under its outer shell. This ocean has long been theorized but never confirmed.
Titan is the biggest of the more than 60 known moons orbiting Saturn, and is larger than the planet Mercury. Scientists have long suspected that an ocean might lurk under Titan's surface, as well as under Jupiter's moons Ganymede, Callisto and Europa. Previous observations have shown that the entire surface of Titan appears to be sliding around like cheese over tomato sauce on a pizza.