Dwarf planets are round bodies in space that orbit the sun, are not moons, and are not large enough to clear away their paths around the sun. Dwarf planets often have similar objects that orbit near them. Dwarf planets are larger than asteroids but are still too small to be classified as a planet.
Asteroids are large lumps of icy rock or metal moving around the Sun. More than 200 years ago, astronomers were looking for a new planet when they found the first asteroids. These asteroids are between Mars and Jupiter and it is called the Asteroid Belt. Asteroids are too small to be a planet or a dwarf planet.