Icy Dwarf Planet Ceres May Have a Warm Heart

Under the surface of the dwarf planet Ceres are strange jumbled zones that are mixes of ice and rock, a new study finds. This research suggests that Ceres might still be warmed by radioactive material in its interior, scientists say. With a diameter of about 585 miles (940 kilometers), Ceres is by far the biggest member of the asteroid belt located between Mars and Jupiter.