The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 170
Surface. — The sunssurface is a hundred and ninety thousand times as bright asa candle-flame, a hundred and forty-six times as bright asthe calcium-hght, and about three times and a half as brightas the voltaic arc. The suns disk is much less bright near the margin thannear the centre, a point on… … 152 ASTRONOMY. atmosphere as we pass from the centre towards the marginof the suns disk; and this increased absorption is due tothe fact, that the rays which reach us from near the marginhave to traverse a much greater thickness of the solaratmosphere than those which reach us from the centre ofthe…
Astronomy
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