Peck, William G. (William Guy), 1820-1892 · New York, Chicago, A. S. Barnes & company · leaf 284
a conse-quence the apparent curvature will depend not only uponthe actual amount of bending, but also upon the positionfrom which it is viewed ; if seen from a point in, or nearlyin, the plane of the comets orbit, the tail will appear nearlystraight; if seen obliquely, the amount of curvature… … Fig. 101. Donatis Comet, 1858. The explanation of this curved appearance depends ona theory that has been advanced to account for the forma-tion of the coma and tail. The theory in question supposesthat a portion of the comet becomes vaporized in approach-ing the sun, and that the vapors thus…
Astronomy
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