Suggestions to Teachers Designed to Accompny a Text book of Astronomy
Suggestions to Teachers Designed to Accompny a Text book of Astronomy
George C George Cary Comstock
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122, using for this purpose the right ascensions and declinations given in- the table e. G. , show in this way that two such stars as Nos. 33 and 34, which appear near each other in Fig. 122, are really widely 'separated in the sky. Their apparent proximity in the figure comes fr*m the unavoidable neglect of their declinations in its construc- tion. 191. Insist that the pupil shall trace out upon the sky some of the allineations given in this section. 192. In Fig. 113 the apparent proper motion...s of the meteors are shown by the herring-bone markings upon the semicircle which represents the sky. 193. Show by a graphical construction like that of 7 how the angular proper motion of a star, given in seconds per year, can be turned into linear measure, miles per year, when the distance is known. The proper motion corre- sponds to the angle subtended by the window. 194. The question at the end of this section, of course, does not admit of a direct answer. It is inserted as an ap- peal to the pupil's imagination.
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