Jupiter's north polar region, seen from NASA's Juno spacecraft in August 2016. The clouds in the polar regions do not form bands like in the equatorial regions. Instead they form rotating storms of various sizes. Jupiter is the largest planet in the solar system. It has a diameter of around 140, 000 kilometres, more than ten times that of Earth. It is a gas giant and is mostly hydrogen and helium. Its clouds are coloured by trace chemical elements. Juno arrived at Jupiter in July 2016. Its mission is to orbit Jupiter over the next year, gathering information about the planet's atmosphere, magnetic field and gravitational field. This image, contrast-enhanced to show cloud details, was obtained by the JunoCam instrument on 27 August 2016.