Jovian planets (Jupiter, Saturn, Uranus, and Neptune) are further away from the sun than Terrestrial planets. Jovian planets are split into two categories gas giants (Jupiter & Saturn) and ice giants (Uranus & Neptune) gas giants are predominantly made of helium and hydrogen and ice giants contain rock, Ice, water, methane, and ammonia. but all of them have multiple moons, support ring systems, they have no solid surface and are huge in size.