Astronomy for schools; upon the basis of Mons. Arago's lectures at the Royal observatory of Paris .. (1841)
Arago, F. (François), 1786-1853, Haskins, Roswell William, [from old catalog] ed · New York, Robinson, Pratt & co.; · leaf 147
SI n … V3 X By these figures it will be seen that the rings arenever so situated with regard to the earth as that theplane of them should lie at right angles to our line ofvision; but that we always view their sides under agreater or less degree of obliquity. Were they placedwith the side fully presented…
Astronomy
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