Jupiter is bigger than all the other planets put together, and over 1,300 times the volume of the earth. It is a great ball of hydrogen and helium with small amounts of other elements - a sample of the gases from which the Solar System was formed.

The great red spot (lower left) is a storm bigger than the Earth that has been there since observations began 300 years ago.

Distance from Sun (million km): 778 57.9
Year (time to go round the Sun): 11.9 Earth years 88 Earth days
Day (time to revolve round axis): 9 hours 50 minutes
Diameter at equator (km): 142,948
Known moons: 16
Mass (Earth = 1): 317.8
Gravity at surface (Earth = 1): 2.6