This nearby dwarf planet's ice may be left over from a dirty ocean

Pluto is the most famous dwarf planet, due in part to its very public demotion from ninth planet of the solar system two decades ago. But a relatively obscure dwarf planet in the main asteroid belt could be the most accessible icy world to Earthlings in space. Though it's less than 600 miles wide, Ceres appears to be rich in water ice, and new research from Purdue University and NASA's Jet Propulsion Laboratory is helping to confirm it was once drenched in flowing water. For years, Cer