SP-4212
On 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).

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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