The call of the stars; a popular introduction to a knowledge of the starry skies with their romance and legend . three appear to be intimately connected with the for-mation of sun-spots, and are mostly found in the spotzones. Some of the masses of heated gas hurled fromthe eruptive prominences must, it is evident, passbeyond the solar control, since the Suns attractionis unable to hold back any matter that started fromits surface with a velocity greater than three hundredand eighty-three miles a second. Escaping into space,these masses would condense into solid bodies and speedawa
The call of the stars; a popular introduction to a knowledge of the starry skies with their romance and legend . three appear to be intimately connected with the for-mation of sun-spots, and are mostly found in the spotzones. Some of the masses of heated gas hurled fromthe eruptive prominences must, it is evident, passbeyond the solar control, since the Suns attractionis unable to hold back any matter that started fromits surface with a velocity greater than three hundredand eighty-three miles a second. Escaping into space,these masses would condense into solid bodies and speedaway to regions unknown, an occasional one, per-chance, finding its way to one of the planets. The visible, bright surface of the Sun—the innermostportion that can be seen—is the photosphere, orlight sphere. It is a white cloud-like covering, com-posed largely of intensely hot metallic vapours, andfrom it comes most of the light and heat. It is con-siderably darker at the edge than toward the apparentcentre of the disk, and to the naked eye appears rela-tively uniform and calm. In the telescope the entire. U. S. Naval Observatory, Washington Plate XXIII. Total Eclipse of the Sun, with Corona,May 28, 1900 The Sun 293 surface has a granulated or mottled appearance, whichhas been aptly compared to that of a piece of greycloth with rice-grains or snowfiakes thickly scatteredover it. Above the seething photosphere lies the relativelyquiescent reversing layer, which is composed ofglowing gases, and varies from five hundred to a thou-sand miles in thickness. It is somewhat cooler thanthe photosphere, and contains many of the terrestrialelements in a vaporous state. It was discovered byYoung, by means of the spectroscope, during the totalsolar eclipse of 1870. Scattered through it, and closeto the photosphere, is a thin cloud of small particles,which tends to reduce somewhat the intensity of thelight radiated from the photosphere. On the reversing layer rests the chromosphere,or colou
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