The eight planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. 2 IAU will launch the corresponding procedures to define whether a celestial body belongs to a dwarf planet or other categories. 3 Currently these include most of the asteroids in the solar system, most of the trans-Neptunian objects (TNOs), comets, and other small bodies. 4 The eight classical planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.