Pluto is smaller than Ceres.
Pluto is the largest and second-most-massive known dwarf planet in the Solar System and the ninth-largest and tenth-most-massive known object directly orbiting the Sun .	Pluto	Pluto (mythology)	dwarf planet	dwarf planet	planet	planet	Solar System	Solar System	Sun	Sun
Only two of these bodies , Ceres and Pluto , have been observed in enough detail to demonstrate that they actually fit the IAU 's definition .	Pluto	Pluto
