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 . s put together. This great star is our Sun and since we owe everything wepossess on Earth to him—light, heat, power and even life itself—he should and does stand in a class by himself, though afterall he is just as much of a fixed star as the North Star, theDog Star, or any of the thou-sands of other stars which we seeas mere points of light in the sky. How to See the Sun.—Yonmust never look directly at theSun with the naked eye, for heis so powerful that h
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 . s put together. This great star is our Sun and since we owe everything wepossess on Earth to him—light, heat, power and even life itself—he should and does stand in a class by himself, though afterall he is just as much of a fixed star as the North Star, theDog Star, or any of the thou-sands of other stars which we seeas mere points of light in the sky. How to See the Sun.—Yonmust never look directly at theSun with the naked eye, for heis so powerful that his light willinjure your sight for all time. There are several ways,though, to observe the Sun with-out danger to your eyes and asall of these are simple and costnothing you can easily try most common way is to takea bit of window glass, say an inch square, and smoke one sideof it over the flame of a candle, as shown in Fig. 28. When this blackened glass is held closely to the eye, as shownin Fig. 29, and the latter is directed toward the Sun, a littlecircle of light will appear on the film of smoke and the surface 29. Fig. 28.—Smoking Glassesover Candle Flame. 30 THE BOOK OF THE STARS of the Sun may be examined at length and without the leastdanger. A decided improvement over the smoked glass idea is touse a piece of red, or a piece of yellow glass, as an eyepiece, or,better, place the red and yellow glasses together and bind the edges with paper. An-other plan to see the Sunwithout injury to the eyesis to make a hole with thepoint of a needle in avisiting card and lookthrough the hole directlyat the Sun. A still better view ofthe Sun can be obtainedif a pinhole telescope isused. A telescope of thiskind can be easily madewithout tools, metals orlenses. It is describedand pictured in observe the Sun hold the pinhole end of the tube closelyto your eye, to cut off all the outside light, and sight the tubeso that the Sun shines directly into your eye
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Keywords: ., bookcentury1900, bookdeca, booksubjectastronomy, booksubjectstars
