The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 313
Fig. 320. Comets move in every direction in their orbits, and theseorbitj have every conceivable inclination to the ecliptic. 286 ASTRONOMY. … Fig. 321. 292. Periodic Comets. — There are quite a number of ASTRONOMY. 287
Astronomy
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