Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 287
Mimas can rarely be seen except at its greatest elongation, andthen only with an aperture of twelve inches or more. Hype-rion can be detected only.with the most powerful telescopes,on account of its faintness and the difficulty of distinguishingit from minute stars. Japetus, the outermost… … Fig. 289. ASTRONOMY. 26l faint as Hyperion, and can be seen only in large telescopes.When west of the planet, it is bright; when east of it, faint.This peculiarity has been accounted for by supposing that thesatellite, like our moon, always presents the same face to theplanet and that one side of…
Astronomy
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