Planetary orbits. Computer illustration of the orbits of the nine planets of the solar system. The Sun is at centre. The planets are (from the nearest to the furthest from the Sun): Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto (blue, top right). Due to Pluto's highly elliptical orbit, Neptune is sometimes the furthest planet from the Sun. The Sun produces a continuous stream of charged particles called the solar wind (white/light blue). The Sun and planets are not shown to scale.