<P> With a few exceptions, the farther a planet or belt is from the Sun, the larger the distance between its orbit and the orbit of the next nearer object to the Sun . For example, Venus is approximately 0.33 AU farther out from the Sun than Mercury, whereas Saturn is 4.3 AU out from Jupiter, and Neptune lies 10.5 AU out from Uranus . Attempts have been made to determine a relationship between these orbital distances (for example, the Titius--Bode law), but no such theory has been accepted . The images at the beginning of this section show the orbits of the various constituents of the Solar System on different scales . </P> <P> Some Solar System models attempt to convey the relative scales involved in the Solar System on human terms . Some are small in scale (and may be mechanical--called orreries)--whereas others extend across cities or regional areas . The largest such scale model, the Sweden Solar System, uses the 110 - metre (361 ft) Ericsson Globe in Stockholm as its substitute Sun, and, following the scale, Jupiter is a 7.5 - metre (25 - foot) sphere at Arlanda International Airport, 40 km (25 mi) away, whereas the farthest current object, Sedna, is a 10 cm (4 in) sphere in Luleå, 912 km (567 mi) away . </P> <P> If the Sun--Neptune distance is scaled to 100 metres, then the Sun would be about 3 cm in diameter (roughly two - thirds the diameter of a golf ball), the giant planets would be all smaller than about 3 mm, and Earth's diameter along with that of the other terrestrial planets would be smaller than a flea (0.3 mm) at this scale . </P> <P> Distances of selected bodies of the Solar System from the Sun . The left and right edges of each bar correspond to the perihelion and aphelion of the body, respectively, hence long bars denote high orbital eccentricity . The radius of the Sun is 0.7 million km, and the radius of Jupiter (the largest planet) is 0.07 million km, both too small to resolve on this image . </P>

All of the planets in the solar system