is a celestial body orbiting the Sun that is massive enough to be rounded by its own gravity but has not cleared its neighbouring region of planetesimals and is not a satellite. it has to have sufficient mass to overcome its compressive strength and achieve hydrostatic equilibrium. It should not be confused with a minor planet.
It is the 2nd largest. Ceres is the smallest Dwarf planet. Eris is the largest.
Moons orbit planets. Planets (and dwarf planets) orbit stars.
Pluto
It makes it spherical.
Pluto lost its status as a planet in 2006 when the International Astronomical Union redefined the criteria for what constitutes a planet. Pluto did not meet the new criteria because it did not clear its orbit of other debris. Instead, it was reclassified as a dwarf planet.
A dwarf planet is not considered a planet because it does not dominate its orbital path and cannot clear that path of debris.
Dwarf planets are not a special type of planet. A small planet is later classified a dwarf planet. The only characteristic that makes it a dwarf planet is the size. Your question should be why are some planets small?
Yes, Quaoar is considered a dwarf planet. It is located in the Kuiper Belt, beyond Neptune, and has not cleared its orbit of other debris. This makes it one of the criteria for being classified as a dwarf planet.
Pluto the dwarf planet is an example of of a dwarf planet.
Mercury is not a dwarf planet. It is a planet.
dwarf is a dwarf planet because it is to small to be in the solar system.,
The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.