Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 43
the line A Arepresent the axis ofthe Earth, and B B thepoles or axis of theEcliptic. Now, if theline A A inclines to-ward the plane of theEcliptic, or, in otherwords, departs fromthe line B B to theamount of 23° 28, it isoovious that the planeof the equator, orequinoctial, will de-part from the… … Fig. 10. — Obliquity op the Ecliptic, 26 ELECTRO-ASTRONOMICAL ATLAS. position in space, nor with respect to each other.But it is a remarkable and well-ascertained factthat both are in a state of constant change. Wehave seen that the plane of the Earths equator isconstantly drawn out of place by the…
Astronomy
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