Popular astronomy : a concise elementary treatise on the sun, planets, satellites and comets (1865)
Mitchel, O. M. (Ormsby MacKnight), 1809-1862 · New York : Oakley & Mason · leaf 328
gent of the inclination^ can only vary within narrowlimits, returning at the end of a vast cycle to the primi-tive value. We shall see hereafter how important the stability ofthe inclination of the earths orbit is to the well-beingof the living and sentient beings now on the earthssurface. We… … 808 THE SUN AND PLANETS For this purpose we return to the figure already em-ployed, using the same planets, Mars and the earth, re-garding the movements of Mars to be disturbed by theearths attraction. We have abeady seen that in C2ise Mars be at M, theearth being at E, the planet, in descending…
Astronomy
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