Ceres exists.
Ceres ( [ ˈsɪəriːz ] minor-planet designation : 1 Ceres ) is the largest object in the asteroid belt that lies between the orbits of Mars and Jupiter . Its diameter is approximately 945 km , making it the largest of the minor planets within the orbit of Neptune . Ceres appears to be differentiated into a rocky core and an icy mantle , and may have a remnant internal ocean of liquid water under the layer of ice . Ceres is a non-profit sustainability advocacy organization based in Boston , Massachusetts .