If this radiant energy could come unhindered to our eyes every star would appear white, but they are all surrounded by atmospheres-analogous to the chromosphere and reversing layer of the sun-which absorb a portion of their radiant energy and, like the earth's atmosphere, take a heavier toll from the violet than from the red end of the spectrum.
"A Text-Book of Astronomy"
George C. Comstock
The gaseous envelope from which the prominences spring has been called the chromosphere on account of the coloured lines displayed in its spectrum.
"The Story of the Heavens"
Robert Stawell Ball
About a dozen less conspicuous lines were gradually identified in the spectrum of the prominences and the chromosphere, which appeared also to be caused by this same mysterious helium.
"The Story of the Heavens"
Robert Stawell Ball