Ceres Image of Ceres taken with the Dawn spacecraft Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA/Justin Cowart
Dwarf Planets Our Solar System has 8 planets. It also contains dwarf planets. Pluto is the best known but there are 4 others. They are called Ceres, Eris, Haumea, and Makemake. Ceres is the only dwarf planet in the asteroid belt.