The largest object is the asteroid belt is the dwarf planet Ceres, which is 950km in ... fly around the Sun in flat circular or oval orbits, the Oort Cloud is more like a sphere, with many icy ...
which are too small to be considered planets. The best known of these is Pluto, an ice dwarf that orbits far from the Sun, beyond the orbits of Uranus and Neptune. Pluto was previously classed as ...