Ceres is the largest asteroid and the only dwarf planet in the inner Solar System.
Makemake is a dwarf planet and perhaps the largest Kuiper belt object.
Pluto is a large trans-Neptunian object in the Kuiper belt; the second-most-massive dwarf planet known in the Solar System.
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System.
Mercury is the smallest and closest to the Sun of the eight planets in the Solar System.
Venus is the second planet from the Sun and often considered Earth’s sister planet.