Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 383
continuation of the coma,extending out to a great distance, and usually directedaway from the Sun. It has the appearance of a stream ofmilky light, which grows fainter and broader as it recedesfrom the head. The length of the tail varies from 2° or 3°to 90° or more. The tail of the great comet of… … Fig. 191.—The Great Comet of 1858. COMETS. 359 sheet. The mass of comets is extremely small, so smallthat no comet has yet been observed to produce perturba-tions in the motion of any planet. It is to be rememberedthat we do not see the tail of a comet in its true shape, butonly its projection on…
Astronomy
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