Kippax, John Robert, 1849- [from old catalog] · New York and London, G. P. Putnam's sons · leaf 356
to be elevated above the general level,and are best seen near the edge of the solar disk. Thef aculae are the brightest parts of the Sun, and are espe-cially abundant and active in the vicinity of sun-spots.Unlike the spots, however, they are found everywhere,except in polar latitudes. Moreover, a… … Yerkes Observatory Plate XXII. A Large Solar Prominence (two views) (October lO, 1910) The Sun 291 spots increase and decrease about every eleven years.They are projections from a layer of prominent gases—the chromosphere—surrounding the photosphere.They are of a brilliant red colour—due to…
Stars · Constellations · Planets
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