Sun lore of all ages; a collection of myths and legends concerning the sun and its worship (1914)
Olcott, William Tyler, 1873-1936 · New York London, G. P. Putnam's sons · leaf 398
re miles. The spots are composed of a dark nucleus orcentral core surrounded by a fringe a trifle lighterin hue called the umbra, and this in turn is sur-rounded by a border known as the penumbra. Thespots, strangely enough, are found for the mostpart in a zone extending thirty-five degrees on… … Suns Disk, Showing Spots and Granulation, July 30, 1906. Yerkes The Sun Revealed by Science 321 disk, and changes in their extent and shape can beeasily observed. Frequently they endure whileinvisible to us, and on their reappearance exhibitmarked changes in size and contour. It has beenproved that…
Sun worship · Mythology
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