Brennan, Martin Stanislaus, 1845-1927 · New York : The Catholic publication society co. · leaf 62
The stores of heat of the Simsinterior reach the surface by means of vertical convec-tion-currents. The photospheric clouds may probablybe composed of carbon, silicon, and boron. Theu grains/ or bright parts of the photosphere, representthe upper terminations of the ascending warm currents,and the… … Fig. 5.—Sun-Spot (Secchi). calculates that if the whole surface of the Sun wereuniformly as bright as these grains, it would emit fromten to twenty times its present amount of light. Thephotosphere is the seat of the Suns light and heat. Owing to the awful brightness of the photosphere,the two…
Astronomy
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