Mars: Exploration of the Red Planet. 1958-1978
- Fig. 1. Orbits of the inner
planets of the solar system are drawn to scale (although the sizes
of the planets are not). Orbits of Venus and Earth are nearly
circular. Mercury and Mars orbits are eccentric. Perihelion points
of Mercury and Mars are indicated by [Greek letter pi] and apelion
by a (Greek letter alpha).
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