Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 117
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. … WEED, PARSONS 8. CO. ALBANY, N. A.TOLLE.PHOTQrLITH. FORMS Of CO METS ELECTRO-ASTRONOMICAL ATLAS. 07 A. By the size and position of their orbits andthe direction of their motions. Q. What is the form of their orbits ? A. They move aronnd the Sun either in ellipti-cal orbits or curved lines called…
Astronomy
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