Flammarion, Camille, 1842-1925, Welby, Frances A. (Frances Alice) tr · New York, D. Appleton and company · leaf 116
Fig. 29.—Direct photograph of the Sun. surface; but as a matter of fact it radiates a light 2,000times superior in intensity to that of the full moon. Some idea of the aspect of these spots may be ob-tained from the accompanying reproduction of a photo-graph of the Sun (taken September 8, 1898, at… … tfe^iH. Fig. 30.—Telescopic aspect of a Sun-Spot. with flames. As a rule, the spots undergo rapid trans-formations. These spots, which appear of insignificant dimen- 97 ASTRONOMY FOR AMATEURS sions to the observers on the Earth, are in reality ab-solutely gigantic. Some that have been measuredare…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
