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 382
Fig. 407. Fig. 408. together that they almost seem to touch when seen withthe naked eye. Pairs of stars are not considered double unless the com-ponents are so near together that they both appear in the 356 ASTRONOMY, field of view when examined with a telescope. In themajority of the pairs classed…
Astronomy
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