Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 323
passage the distance ofthe comet from the photosphere of the sun was less thanone-fourteenth of the diameter of the sun. This distance wasonly one-half that of the comet of 1680 when at its perihelion.When at perihelion, this comet was plunging through the sunsouter atmosphere at the rate of one… … Fig. 333- the tail extended almost double the earths distance from thesun, the end of the tail must have traversed in two hours aspace nearly equal to the circumference of the earths orbit,—a distance which the earth, moving at the rate of about twentymiles a second, is a whole year in passing. It…
Astronomy
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