The book of stars; being a simple explanation of the stars and their uses to boy life, written to conform to the tests of the Boy scouts . CO it. Ml Ill Q -J a z— < u Fig. 30.—A CandleFlame ShowingLayers of Flame. 32 THE BOOK OF THE STARS is surrounded with several kinds of flame, so the Sun has threelayers of flame around a central core. The core of the Sun is believed to be formed of liquid gaseswhich are about as thick as New Orleans molasses. Around this core, which is the real source of the Suns lightand heat—and which has never been seen—is a dark layer offlame usually called the Suns
The book of stars; being a simple explanation of the stars and their uses to boy life, written to conform to the tests of the Boy scouts . CO it. Ml Ill Q -J a z— < u Fig. 30.—A CandleFlame ShowingLayers of Flame. 32 THE BOOK OF THE STARS is surrounded with several kinds of flame, so the Sun has threelayers of flame around a central core. The core of the Sun is believed to be formed of liquid gaseswhich are about as thick as New Orleans molasses. Around this core, which is the real source of the Suns lightand heat—and which has never been seen—is a dark layer offlame usually called the Suns surface; this layer, which is cov-. Fig. 31.—The Sun as We See It. ered with numerous dark spots like freckles on the face of ared-headed boy, is called the photosphere, and it is this part ofthe Sun which gives out the most light. The second layer, which is called the chromosphere, is about5,000 miles thick, and if you could imagine the whole worldafire you would then have but a faint idea of what a mightyseething sea of flame this layer is. It is in this layer of burninggases that terrific explosions take place and red tongues offlame, or prominences, are shot out for upwards of 300,000miles. Around the chromosphere is another layer of flame which THE SUN, BRIGHTEST OF ALL STARS 33 extends for hundreds of thousands of miles in all last layer is called the corona, and it is as thin as the stuffof which dreams are made. It is formed of burning hydrogenand since it is so thin it can never be seen except when there isa total eclipse, that is when the Moon passes between us and
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