Solar system planets Computer artwork of the eight planets of the solar system which are arrayed from left to right in order of distance from the Sun left The four small rocky planets of the inner solar system are Mercury Venus Earth and Mars The four large gas giant planets of the outer solar system are Jupiter Saturn Uranus and Neptune Pluto was recategorised as a Dwarf planet in so it is not included here At lower right is a galaxy and a small celestial body an asteroid or comet is seen at lower left
