ocean world
-
Saturn’s ‘Death Star’ Moon Is Hiding an Ocean Beneath Its Mangled Surface
An odd little moon that orbits closely to Saturn just revealed its biggest mystery: a hidden ocean that lies beneath its heavily cratered surface. Mimas is less than 123 miles (198 kilometers) wide, too small to be perfectly round, and its icy shell is covered with deep scarring from objects slamming into it. Its most…