Star-land; being talks with young people about the wonders of the heavens (1899)
Ball, Robert Stawell, Sir, 1840- [from old catalog] · Boston and London, Ginn & company · leaf 48
you will generally see the brilliant sur-face marked with dark spots, which are sometimes asnumerous as in the case represented in Fig. 13. These SUN-SPOTS. 35 spots present very different appearances according tocircumstances. One such spot when seen with a verypowerful telescope showed the… … Fig. 13. — This is what the Sun sometimes looks like. brilliant surface to the interior and darker parts. Some-times the spots close up, and fresh ones will open else-where. Now and then the whole surface is mottledover in a remarkable way. I give here a picture whichwas taken from Mr. Nasmyths…
Astronomy
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