Asteroid Ceres is a former ocean world that slowly formed into a giant, murky icy orb

A crater-rich dwarf planet named Ceres located in the main asteroid belt between the orbits of Mars and Jupiter was long thought to be composed of a materials mixture not dominated by water ice. Researchers at Purdue used data from NASA's Dawn mission to show that Ceres' crust could be over 90 percent ice.

source https://www.sciencedaily.com/releases/2024/09/240927173206.htm