Definition:Dwarf Planet

Definition
A dwarf planet is a celestial body which orbits a star (or the remains of a star) that:


 * $(1): \quad$ has enough mass so that its own gravitational field makes it approximately spherical
 * $(2): \quad$ does not have enough mass to trigger thermonuclear fusion
 * $(3): \quad$ has not cleared its neighbouring region of planetesimals.

Also see

 * Definition:Planet