The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 399
d this spectrum shows thatsomething is at work in the atmosphere of those redstars different from what there is in the simpler atmosphereof Type I. Lockyer holds that these differences of spectra are duesimply to differences of temperature. According to him,the red stars, which give the fluted… … Fig. 428. sociation (161) of the elements is nearly if not quitecomplete. ASTRONOMY. 373 III. NEBULA. Classification of Nebul.«. 370. Planetary Nebula.. — Many nebulae (328) present awell-defined circular disk, like that of a planet, and are there-fore called planetary nebulae. Specimens of…
Astronomy
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