The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1872)
White, Charles J. (Charles Joyce), 1839-1917 · Philadelphia, Claxton, Remsen & Haffelfinger · leaf 200
ce that some such force doesexist. Nor has it yet been determined what is the force whichoriginally detaches these vaporous particles from the nucleus: itmay be the same repelling force which drives them to the rear, itmay be a force generated in the nucleus itself, or it may be acombination of… … tual attraction, or by the attraction exerted upon them by thedenser mass which constitutes the head. 236. Curvature of the Tail.—The tail of a comet is usually notstraight, but is concave towards that part of space which thecomet is leaving. If we assume the existence of a solar repul-sive force,…
Astronomy
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