Fig. 7.2. Major planets from Mercury to Neptune. Four innermost planets are called terrestrial planets and four outermost ones are giant planets. Three dwarf planets are also shown.

Neptune and the dwarf planet Pluto. The arrows indicate the distances travelled by the planets during the 10 year interval 2000-2010.

Relative size of the Sun is shown at left. Planetary distances to the Sun are not in scale. (The International Astronomical Union/Martin Kornmesser)

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