Neptune is the eighth planet in the Solar System, the second planet to be "discovered", the first planet to be discovered without actually being seen and the last of the four "Gas Giants"! Named after the Roman god of the sea, probably because of its deep blue colour, Neptune is also the windiest planet in the Solar System. Its orbit sometimes goes beyond that of Pluto, meaning that for a certain length of time, it is actually the most distant known planet in the Solar System. Orbiting Neptune are at least thirteen moons and a ring system.