Classification of Planets

Inner Planets Include Mercury, Venus, Earth and Mars – They are called as Terrestrial or Rocky planets. They are nearer to the Sun.

Outer Planets Include Jupiter, Saturn, Uranus and Neptune – They are called as Jovian or Gaseous planets. They are far away from the Sun.

Dwarf Planet According the International Astronomical Union (IAU), it is a celestial body in direct orbit of the Sun that is massive enough that its shape is controlled by gravitational forces, but has not cleared its neighbourhood. e.g., Pluto, Ceres, Eris, Makemake and Haumea.