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Top image: NASA, ESA, J. Parker (Southwest Research Inst.),
and L. McFadden (Univ. of Md.); bottom image: Ann Feild, STScI Graphics Dept.

Ceres is round and has a thin, dusty outer crust. Water may even be locked beneath the crust. Ceres' physical characteristics are like those of the icy moons of the outer planets.