Jupiter

Jupiter is the largest planet in the Solar System, both in diameter and in mass, and is the fifth closest to the Sun. It has less than a thousandth of the solar mass, yet it has 2.5 times the mass of all other planets together. It is a gaseous planet, along with Saturn, Uranus and Neptune. These four planets are sometimes called Jupiterian planets or Jovian planets, and are the four gas giants, that is, which are not composed primarily of solid matter.