Astronomers discover an underground ocean that could support life on Mimas, the moon of Saturn known as the Death Star. “Mimas was perhaps the most unlikely place to look for a global ocean, and liquid water in general,” co-author Valery Lainey of the Paris Observatory explained in an email.
‘So it looks like a potentially habitable world, but no one knows how long it takes for life to emerge,’ he said. The ocean is believed to be between 5 and 15 million years old.