Because it was so small. And it was made of rock and ice not like other planets. And because it is too small it has weak gravity and because of the weak gravity it can't clear the objects in it's neighborhood.
Pluto the dwarf planet is an example of of a dwarf planet.
The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.
Pluto, it is now a dwarf planet or planetoid.
Pluto Became a Dwarf Planet in 2007.
Pluto is not a planet its a dwarf planet
As of 2006, Pluto has been classified as a dwarf planet.
Pluto is a dwarf planet
dwarf planet Pluto
No. Pluto is a rocky/icy dwarf planet. In fact, no dwarf planets are gaseous.
Pluto has been re-classified as a Dwarf Planet.
The dwarf planet Pluto is located about 3.67 billion miles from the Sun.
Pluto is now designated as a dwarf planet.