Ball, R[obert] S[tawell], Sir, 1840- [from old catalog] · New York, H. Holt and company · leaf 89
ds k, so that when theearth reaches a Mars will havereached k, after which it will gradually return againtowards h. We thus see that if the motion of Mars be such aswe have supposed, we should expect to find that theplanet sometimes appears to be moving in one way,sometimes in another way, and… … 7i CHAPTER X.keplers laws. § 56. Orbits of the Planets are not Perfect Circles.We have hitherto only been considering such generalfeatures of the movements of the planets as can beobserved without the aid of telescopes, or with merelysuch optical power as is necessary to reveal the…
Astronomy
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