The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 402
Fig- 431- ASTRONOMY. 375 ever, a great variety of spiral forms. We shall have occa-sion to speak of these nebulae again (381-383). 375. Double and Multiple Nebula. — Many (torthle and « Kg- 432-multiple nebulae have been observed, some of which arerepresented in Fig. 434. Fig. 435 shows what… … Fig. 433- The change of position in the components of this doublenebula indicates a motion of revolution similar to that ofthe components of double stars. 37^ ASTRONOMY. Irregular Nebula. 376. Irregular Forms. — Besides the more or less regu-lar forms of nebulae which have been classified as…
Astronomy
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