Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 246
dark stripe down §314] THE SHEATH. 235 the centre of the tail was sharply denned. Two weeks laterthe nucleus had been broken up and transformed into acrooked stream, some 50,000 miles in length, of five or sixbright points : the envelopes had vanished from the head, andthe dark stripe was replaced… … Fig. 66. —The Sheath, and the Attendants of the Comet of 1882. continued only a few days and were not certainly identified,although the general aspect of the spectrum indicated thatiron, manganese, and calcium were probably present. By themiddle of October it had become simply the normal…
Astronomy
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