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 393
splacement to be noticeableto the unaided eye. 366 ASTRONOMY. 364. Secular Displacement of the Stars.—Thoughproper motion of the stars is apparently slight, it will,the course of many age% produce a marked change in theconfiguration of the stars. Thus, in Fig. 420, the left-handportion shows the… … Fig. 421. stars as they will appear thirty-six thousand years from thepresent time. Fig. 421 shows in a similar way the present configura-tion and proper motion of the stars of Cassiopeia, andalso these stars as they will appear thirty-six thousand yearshence. Fig. 422 shows the same for the…
Astronomy
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