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 190
n the dis-placement of the F line in the spectrum of Sirius. Thisis one of the hydrogen lines. R V is the spectrum, Rbeing the red, and V the violet end. The long verticalline is the bright F line of hydrogen, and the shortdark line to the left of it is the position of the F linein the spectrum of… … 172 ASTRONOMY. must be moving at the rate of some twenty-five or thirtymiles a second. 170. Contortion of Lines on the Disk of the Sun.—Certain of the dark lines seen on the centre of the sunsdisk often appear more or less distorted, as shown inFig. 186, which represents the- contortion of the…
Astronomy
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