Dwarf planet
Pluto
The Kuiper Belt dwarf planet
Description
Considered a planet until 2006, Pluto is now classified by the IAU as a dwarf planet. In 2015 the New Horizons probe revealed plains of nitrogen ice, water-ice mountains and a thin atmosphere.
Did you know?
The large bright heart-shaped region is called Tombaugh Regio, after its discoverer.