Abstract
The revolution period of Mars round the Sun, or its sidereal year, is, as we have seen earlier, 686d 23h 30m 40s, or 686.979, or 687 days to within an accuracy of 2/100. The orbit is markedly elliptical, with an eccentricity of 0.093. The major axis, or line of apsides, from perihelion to aphelion, lies in the direction 334° (perihelion) to 154° (aphelion). The summer solstice of the southern hemisphere lies at heliocentric longitude 356°48′, and the line leading from this solstice to the opposite solstice lies in the direction 365°′48′–176°48′ (see Fig. 1, Chap. 4).
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Notes
- 1.
(61/59)2 = almost (62/60)2 = (31/30)2 = 96/90 or 16/15.
- 2.
See SIR ROBERT BALL, The Cause of an Ice Age, 1892.—Wiener, Ueber die Stärke der Bestrahlung, Zeitschrift der OEsterireichischein Gesellschaft für Meteorologie, 1879.
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Sheehan, W. (2015). The Seasons of Mars. In: Sheehan, W. (eds) Camille Flammarion's The Planet Mars. Astrophysics and Space Science Library, vol 409. Springer, Cham. https://doi.org/10.1007/978-3-319-09641-4_9
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DOI: https://doi.org/10.1007/978-3-319-09641-4_9
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