Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 116
er planets are found circulatingamong the planets of the Solar System ? A. They are Comets. Q. What is their appearance ? A. They are bodies of the nebulous form,composed of a nucleus of a bright center orhead; the coma, a kind of envelope of anebulous substance, and a tail moving in anopposite… … A. They are extremely varied in appearance, Fig. 49. 1. TAIIXESS COMET. 2. HEAD WITHOUT TAIL OB KT70XEU8. 4 some have no tails, others have several tails, someappear without any nucleus. Q. When these bodies are far away from theEarth and Sun how are they distinguished fromthe planets ? PLATE XIX.
Astronomy
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